{"id":4684,"date":"2025-09-11T20:11:00","date_gmt":"2025-09-11T20:11:00","guid":{"rendered":"https:\/\/zynoo.com\/blog\/error-establishing-a-database-connection\/"},"modified":"2026-10-30T10:52:30","modified_gmt":"2026-10-30T10:52:30","slug":"error-establishing-a-database-connection","status":"publish","type":"post","link":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/","title":{"rendered":"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\" id=\"h-\">Th\u00f4ng b\u00e1o <strong>\u201cl\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u\u201d<\/strong> trong WordPress c\u00f3 ngh\u0129a l\u00e0 trang web c\u1ee7a b\u1ea1n kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u MySQL ho\u1eb7c MariaDB. C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u1ed3m th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng ch\u00ednh x\u00e1c, m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng kh\u1ea3 d\u1ee5ng ho\u1eb7c t\u00e0i nguy\u00ean hosting b\u1ecb gi\u1edbi h\u1ea1n.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u \u0111\u1ea7u ti\u00ean c\u1ea7n ki\u1ec3m tra l\u00e0 c\u1ea5u h\u00ecnh c\u01a1 s\u1edf d\u1eef li\u1ec7u trong <code>wp-config.php<\/code>. N\u1ebfu c\u00e1c thi\u1ebft l\u1eadp n\u00e0y ch\u00ednh x\u00e1c, b\u1ea1n c\u1ea7n ki\u1ec3m tra m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 t\u00ecnh tr\u1ea1ng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3.<\/p>\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch c\u00e1ch x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n v\u00e0 kh\u00f4i ph\u1ee5c trang web c\u1ee7a b\u1ea1n m\u1ed9t c\u00e1ch an to\u00e0n.<\/p>\n\n<h2 id=\"h-what-causes-the-wordpress-database-connection-error\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nguyen_nhan_nao_gay_ra_loi_ket_noi_co_so_du_lieu_trong_WordPress\"><\/span>Nguy\u00ean nh\u00e2n n\u00e0o g\u00e2y ra l\u1ed7i k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">WordPress s\u1eed d\u1ee5ng c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec3 l\u01b0u tr\u1eef b\u00e0i vi\u1ebft, trang, thi\u1ebft l\u1eadp v\u00e0 th\u00f4ng tin ng\u01b0\u1eddi d\u00f9ng. Khi k\u1ebft n\u1ed1i \u0111\u00f3 g\u1eb7p l\u1ed7i, WordPress kh\u00f4ng th\u1ec3 truy xu\u1ea5t th\u00f4ng tin c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea3i trang web c\u1ee7a b\u1ea1n.<\/p>\n\n<p class=\"wp-block-paragraph\">C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>T\u00ean c\u01a1 s\u1edf d\u1eef li\u1ec7u, t\u00ean ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c m\u1eadt kh\u1ea9u kh\u00f4ng ch\u00ednh x\u00e1c.<\/li>\n\n\n\n<li>T\u00ean m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng \u0111\u00fang.<\/li>\n\n\n\n<li>D\u1ecbch v\u1ee5 MySQL ho\u1eb7c MariaDB ng\u1eebng ho\u1ea1t \u0111\u1ed9ng.<\/li>\n\n\n\n<li>Ng\u01b0\u1eddi d\u00f9ng c\u01a1 s\u1edf d\u1eef li\u1ec7u thi\u1ebfu quy\u1ec1n truy c\u1eadp.<\/li>\n\n\n\n<li>Gi\u1edbi h\u1ea1n s\u1ed1 l\u01b0\u1ee3ng k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u1eb7c m\u00e1y ch\u1ee7 kh\u00f4ng \u0111\u1ee7 t\u00e0i nguy\u00ean.<\/li>\n\n\n\n<li>Thi\u1ebft l\u1eadp kh\u00f4ng ch\u00ednh x\u00e1c sau khi chuy\u1ec3n trang web sang m\u00f4i tr\u01b0\u1eddng m\u1edbi.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi t\u00ecm nguy\u00ean nh\u00e2n v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1, h\u00e3y sao l\u01b0u c\u00e1c t\u1ec7p trang web v\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u n\u1ebfu c\u00f3 th\u1ec3, \u0111\u1eb7c bi\u1ec7t l\u00e0 tr\u01b0\u1edbc khi thay \u0111\u1ed5i c\u1ea5u h\u00ecnh ho\u1eb7c th\u1eed s\u1eeda ch\u1eefa.<\/p>\n\n<h2 id=\"h-1-check-your-database-credentials-in-wp-config-php\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Kiem_tra_thong_tin_dang_nhap_co_so_du_lieu_trong_wp-configphp\"><\/span>1. Ki\u1ec3m tra th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u trong wp-config.php<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng ch\u00ednh x\u00e1c l\u00e0 m\u1ed9t trong nh\u1eefng l\u00fd do ph\u1ed5 bi\u1ebfn nh\u1ea5t khi\u1ebfn WordPress kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/p>\n\n<p class=\"wp-block-paragraph\">T\u1ec7p <code>wp-config.php<\/code> ch\u1ee9a th\u00f4ng tin m\u00e0 WordPress s\u1eed d\u1ee5ng \u0111\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i \u0111\u00f3.<\/p>\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-wp-config-database-settings-1024x576.webp\" alt=\"C\u1ea5u h\u00ecnh c\u01a1 s\u1edf d\u1eef li\u1ec7u WordPress trong wp-config.php hi\u1ec3n th\u1ecb c\u00e1c thi\u1ebft l\u1eadp DB_NAME, DB_USER, DB_PASSWORD v\u00e0 DB_HOST\" class=\"wp-image-4646\" srcset=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-wp-config-database-settings-1024x576.webp 1024w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-wp-config-database-settings-300x169.webp 300w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-wp-config-database-settings-768x432.webp 768w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-wp-config-database-settings-1536x864.webp 1536w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-wp-config-database-settings.webp 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<h3 id=\"h-how-to-locate-wp-config-php\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cach_tim_wp-configphp\"><\/span>C\u00e1ch t\u00ecm wp-config.php<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>\u0110\u0103ng nh\u1eadp v\u00e0o b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n hosting c\u1ee7a b\u1ea1n.<\/li>\n\n\n\n<li>M\u1edf Tr\u00ecnh qu\u1ea3n l\u00fd t\u1ec7p ho\u1eb7c k\u1ebft n\u1ed1i qua SFTP.<\/li>\n\n\n\n<li>Truy c\u1eadp th\u01b0 m\u1ee5c c\u00e0i \u0111\u1eb7t WordPress, th\u01b0\u1eddng l\u00e0 <code>public_html<\/code>.<\/li>\n\n\n\n<li>T\u00ecm t\u1ec7p <code>wp-config.php<\/code>.<\/li>\n\n\n\n<li>T\u1ea3i xu\u1ed1ng m\u1ed9t b\u1ea3n sao l\u01b0u tr\u01b0\u1edbc khi ch\u1ec9nh s\u1eeda t\u1ec7p.<\/li>\n<\/ol>\n\n<p class=\"wp-block-paragraph\">T\u00ecm b\u1ed1n thi\u1ebft l\u1eadp sau:<\/p>\n\n<pre class=\"wp-block-code\"><code>define( 'DB_NAME', 'your_database_name' );\ndefine( 'DB_USER', 'your_database_user' );\ndefine( 'DB_PASSWORD', 'your_database_password' );\ndefine( 'DB_HOST', 'localhost' );<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 c\u00e1c gi\u00e1 tr\u1ecb v\u00ed d\u1ee5, kh\u00f4ng ph\u1ea3i gi\u00e1 tr\u1ecb b\u1ea1n n\u00ean sao ch\u00e9p v\u00e0o c\u1ea5u h\u00ecnh c\u1ee7a m\u00ecnh.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i chi\u1ebfu ch\u00fang v\u1edbi th\u00f4ng tin c\u01a1 s\u1edf d\u1eef li\u1ec7u trong b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n hosting c\u1ee7a b\u1ea1n.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu t\u00ean ng\u01b0\u1eddi d\u00f9ng, t\u00ean c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u1eb7c m\u1eadt kh\u1ea9u kh\u00f4ng ch\u00ednh x\u00e1c, h\u00e3y c\u1eadp nh\u1eadt thi\u1ebft l\u1eadp t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n<p class=\"wp-block-paragraph\">H\u00e3y nh\u1edb r\u1eb1ng th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1c v\u1edbi th\u00f4ng tin \u0111\u0103ng nh\u1eadp t\u00e0i kho\u1ea3n qu\u1ea3n tr\u1ecb WordPress.<\/p>\n\n<h2 id=\"h-2-verify-your-database-host\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Xac_minh_may_chu_co_so_du_lieu\"><\/span>2. X\u00e1c minh m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 khi th\u00f4ng tin \u0111\u0103ng nh\u1eadp ch\u00ednh x\u00e1c, WordPress v\u1eabn kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i n\u1ebfu t\u00ean m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng \u0111\u00fang.<\/p>\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u m\u00f4i tr\u01b0\u1eddng hosting s\u1eed d\u1ee5ng:<\/p>\n\n<pre class=\"wp-block-code\"><code>define( 'DB_HOST', 'localhost' );<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, m\u1ed9t s\u1ed1 nh\u00e0 cung c\u1ea5p s\u1eed d\u1ee5ng t\u00ean m\u00e1y ch\u1ee7 ri\u00eang, \u0111\u1ecba ch\u1ec9 IP ho\u1eb7c c\u1ed5ng t\u00f9y ch\u1ec9nh.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110\u1eebng t\u00f9y ti\u1ec7n \u0111\u1ed5i <code>localhost<\/code> th\u00e0nh <code>127.0.0.1<\/code>. T\u00f9y theo c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7, hai gi\u00e1 tr\u1ecb n\u00e0y c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c k\u1ebft n\u1ed1i kh\u00e1c nhau.<\/p>\n\n<p class=\"wp-block-paragraph\">H\u00e3y x\u00e1c nh\u1eadn th\u00f4ng tin m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u ch\u00ednh x\u00e1c qua b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n hosting ho\u1eb7c v\u1edbi nh\u00e0 cung c\u1ea5p c\u1ee7a b\u1ea1n.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu <strong>l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/strong> xu\u1ea5t hi\u1ec7n ngay sau khi b\u1ea1n chuy\u1ec3n trang web sang m\u00f4i tr\u01b0\u1eddng m\u1edbi, vi\u1ec7c ki\u1ec3m tra t\u00ean m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1edbi \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng.<\/p>\n\n<h2 id=\"h-3-check-whether-your-database-server-is-running\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Kiem_tra_xem_may_chu_co_so_du_lieu_co_dang_hoat_dong_khong\"><\/span>3. Ki\u1ec3m tra xem m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 \u0111ang ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu th\u00f4ng tin \u0111\u0103ng nh\u1eadp v\u00e0 m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec1u ch\u00ednh x\u00e1c, b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 ki\u1ec3m tra d\u1ecbch v\u1ee5 c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/p>\n\n<h3 id=\"h-on-shared-hosting\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tren_shared_hosting\"><\/span>Tr\u00ean shared hosting<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">M\u1edf b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n hosting v\u00e0 th\u1eed truy c\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u qua phpMyAdmin, n\u1ebfu c\u00f3.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu phpMyAdmin c\u0169ng b\u00e1o l\u1ed7i k\u1ebft n\u1ed1i, h\u00e3y li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p hosting \u0111\u1ec3 ki\u1ec3m tra d\u1ecbch v\u1ee5 c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/p>\n\n<p class=\"wp-block-paragraph\">L\u01b0u \u00fd r\u1eb1ng phpMyAdmin ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng nh\u1ea5t thi\u1ebft c\u00f3 ngh\u0129a l\u00e0 ng\u01b0\u1eddi d\u00f9ng c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh trong WordPress c\u00f3 \u0111\u1ee7 quy\u1ec1n truy c\u1eadp.<\/p>\n\n<h3 id=\"h-on-a-vps-or-dedicated-server\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tren_VPS_hoac_may_chu_chuyen_dung\"><\/span>Tr\u00ean VPS ho\u1eb7c m\u00e1y ch\u1ee7 chuy\u00ean d\u1ee5ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n t\u1ef1 qu\u1ea3n l\u00fd m\u00e1y ch\u1ee7 Linux, h\u00e3y k\u1ebft n\u1ed1i qua SSH.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 ki\u1ec3m tra MariaDB:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo systemctl status mariadb<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 ki\u1ec3m tra MySQL:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo systemctl status mysql<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">T\u00ean d\u1ecbch v\u1ee5 c\u00f3 th\u1ec3 kh\u00e1c nhau t\u00f9y theo h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 c\u00e1ch c\u00e0i \u0111\u1eb7t.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu d\u1ecbch v\u1ee5 c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e3 d\u1eebng, h\u00e3y ki\u1ec3m tra nh\u1eadt k\u00fd v\u00e0 t\u00e0i nguy\u00ean hi\u1ec7n c\u00f3 tr\u01b0\u1edbc khi kh\u1edfi \u0111\u1ed9ng l\u1ea1i.<\/p>\n\n<p class=\"wp-block-paragraph\">D\u1ecbch v\u1ee5 c\u01a1 s\u1edf d\u1eef li\u1ec7u ng\u1eebng ho\u1ea1t \u0111\u1ed9ng c\u00f3 th\u1ec3 khi\u1ebfn m\u1ecdi trang web ph\u1ee5 thu\u1ed9c v\u00e0o c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00f3 kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i.<\/p>\n\n<h2 id=\"h-4-verify-database-user-permissions\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Xac_minh_quyen_cua_nguoi_dung_co_so_du_lieu\"><\/span>4. X\u00e1c minh quy\u1ec1n c\u1ee7a ng\u01b0\u1eddi d\u00f9ng c\u01a1 s\u1edf d\u1eef li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">WordPress c\u1ea7n m\u1ed9t ng\u01b0\u1eddi d\u00f9ng c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 \u0111\u1ee7 quy\u1ec1n \u0111\u1ec3 truy c\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e3 c\u1ea5u h\u00ecnh.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n \u0111\u00e3 chuy\u1ec3n trang web sang m\u00f4i tr\u01b0\u1eddng m\u1edbi ho\u1eb7c kh\u00f4i ph\u1ee5c t\u1eeb b\u1ea3n sao l\u01b0u, ng\u01b0\u1eddi d\u00f9ng c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 th\u1ec3 ch\u01b0a \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u ph\u00f9 h\u1ee3p.<\/p>\n\n<p class=\"wp-block-paragraph\">Trong cPanel, h\u00e3y m\u1edf khu v\u1ef1c qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 ki\u1ec3m tra r\u1eb1ng:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>C\u01a1 s\u1edf d\u1eef li\u1ec7u t\u1ed3n t\u1ea1i.<\/li>\n\n\n\n<li>Ng\u01b0\u1eddi d\u00f9ng c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e3 c\u1ea5u h\u00ecnh t\u1ed3n t\u1ea1i.<\/li>\n\n\n\n<li>Ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0\u1ee3c g\u00e1n cho \u0111\u00fang c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/li>\n\n\n\n<li>T\u00e0i kho\u1ea3n c\u00f3 c\u00e1c quy\u1ec1n m\u00e0 WordPress y\u00eau c\u1ea7u.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Tr\u00e1nh thay \u0111\u1ed5i quy\u1ec1n m\u1ed9t c\u00e1ch t\u00f9y ti\u1ec7n. H\u00e3y nh\u1edd nh\u00e0 cung c\u1ea5p hosting h\u1ed7 tr\u1ee3 n\u1ebfu b\u1ea1n kh\u00f4ng ch\u1eafc ch\u1eafn.<\/p>\n\n<h2 id=\"h-5-check-for-database-corruption\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Kiem_tra_co_so_du_lieu_co_bi_hong_khong\"><\/span>5. Ki\u1ec3m tra c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 b\u1ecb h\u1ecfng kh\u00f4ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">C\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1ecb h\u1ecfng \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n so v\u1edbi th\u00f4ng tin \u0111\u0103ng nh\u1eadp kh\u00f4ng ch\u00ednh x\u00e1c ho\u1eb7c s\u1ef1 c\u1ed1 m\u00e1y ch\u1ee7 kh\u00f4ng kh\u1ea3 d\u1ee5ng.<\/p>\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, n\u1ebfu WordPress b\u00e1o c\u00e1c b\u1ea3ng c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1ecb h\u1ecfng ho\u1eb7c c\u00f3 d\u1ea5u hi\u1ec7u c\u1ee5 th\u1ec3 cho th\u1ea5y c\u1ea7n s\u1eeda ch\u1eefa c\u01a1 s\u1edf d\u1eef li\u1ec7u, b\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n ki\u1ec3m tra th\u00eam.<\/p>\n\n<p class=\"wp-block-paragraph\">WordPress c\u00f3 s\u1eb5n t\u00ednh n\u0103ng s\u1eeda ch\u1eefa c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/p>\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc ti\u00ean, h\u00e3y t\u1ea1o m\u1ed9t b\u1ea3n sao l\u01b0u \u0111\u00e1ng tin c\u1eady. Sau \u0111\u00f3, t\u1ea1m th\u1eddi th\u00eam d\u00f2ng n\u00e0y v\u00e0o <code>wp-config.php<\/code>:<\/p>\n\n<pre class=\"wp-block-code\"><code>define( 'WP_ALLOW_REPAIR', true );<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Truy c\u1eadp:<\/p>\n\n<pre class=\"wp-block-code\"><code>https:&#047;&#047;yourdomain.com\/wp-admin\/maint\/repair.php<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">L\u00e0m theo h\u01b0\u1edbng d\u1eabn s\u1eeda ch\u1eefa \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Quan tr\u1ecdng:<\/strong> Khi t\u00ednh n\u0103ng s\u1eeda ch\u1eefa \u0111\u01b0\u1ee3c b\u1eadt, trang n\u00e0y kh\u00f4ng y\u00eau c\u1ea7u phi\u00ean \u0111\u0103ng nh\u1eadp WordPress \u0111\u00e3 x\u00e1c th\u1ef1c. H\u00e3y x\u00f3a d\u00f2ng <code>WP_ALLOW_REPAIR<\/code> ngay sau khi ho\u00e0n t\u1ea5t.<\/p>\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c s\u1eeda ch\u1eefa c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c th\u00f4ng tin \u0111\u0103ng nh\u1eadp kh\u00f4ng ch\u00ednh x\u00e1c, m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng kh\u1ea3 d\u1ee5ng hay m\u1ecdi d\u1ea1ng h\u1ecfng d\u1eef li\u1ec7u. Ch\u1ec9 s\u1eed d\u1ee5ng t\u00ednh n\u0103ng n\u00e0y khi ph\u00f9 h\u1ee3p.<\/p>\n\n<h2 id=\"h-6-check-server-resources-and-database-limits\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Kiem_tra_tai_nguyen_may_chu_va_gioi_han_co_so_du_lieu\"><\/span>6. Ki\u1ec3m tra t\u00e0i nguy\u00ean m\u00e1y ch\u1ee7 v\u00e0 gi\u1edbi h\u1ea1n c\u01a1 s\u1edf d\u1eef li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">L\u1ed7i c\u00f3 xu\u1ea5t hi\u1ec7n v\u00e0o nh\u1eefng l\u00fac trang web c\u00f3 nhi\u1ec1u ho\u1ea1t \u0111\u1ed9ng nh\u01b0ng bi\u1ebfn m\u1ea5t khi b\u1ea1n t\u1ea3i l\u1ea1i trang kh\u00f4ng?<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 cho th\u1ea5y s\u1ed1 l\u01b0\u1ee3ng k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u1ea1t gi\u1edbi h\u1ea1n, t\u00e0i nguy\u00ean \u0111\u00e3 c\u1ea1n ki\u1ec7t ho\u1eb7c m\u00e1y ch\u1ee7 g\u1eb7p s\u1ef1 c\u1ed1 t\u1ea1m th\u1eddi.<\/p>\n\n<p class=\"wp-block-paragraph\">H\u00e3y \u0111\u1ec1 ngh\u1ecb nh\u00e0 cung c\u1ea5p hosting ki\u1ec3m tra:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>M\u1ee9c s\u1eed d\u1ee5ng CPU v\u00e0 b\u1ed9 nh\u1edb.<\/li>\n\n\n\n<li>Gi\u1edbi h\u1ea1n s\u1ed1 l\u01b0\u1ee3ng k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/li>\n\n\n\n<li>Dung l\u01b0\u1ee3ng \u1ed5 \u0111\u0129a c\u00f2n tr\u1ed1ng.<\/li>\n\n\n\n<li>C\u00e1c l\u1ea7n d\u1ecbch v\u1ee5 c\u01a1 s\u1edf d\u1eef li\u1ec7u g\u1eb7p s\u1ef1 c\u1ed1 ho\u1eb7c kh\u1edfi \u0111\u1ed9ng l\u1ea1i.<\/li>\n\n\n\n<li>Nh\u1eadt k\u00fd l\u1ed7i <a href=\"https:\/\/www.php.net\/\">PHP<\/a> v\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 li\u00ean quan.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Tr\u00ean m\u00e1y ch\u1ee7 t\u1ef1 qu\u1ea3n l\u00fd, h\u00e3y tr\u1ef1c ti\u1ebfp ki\u1ec3m tra nh\u1eefng th\u00f4ng tin t\u01b0\u01a1ng t\u1ef1.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110\u1eebng m\u1eb7c \u0111\u1ecbnh r\u1eb1ng n\u00e2ng c\u1ea5p g\u00f3i hosting s\u1ebd gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1. Tr\u01b0\u1edbc ti\u00ean, h\u00e3y x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n th\u1ef1c s\u1ef1.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu <strong>l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/strong> x\u1ea3y ra kh\u00f4ng li\u00ean t\u1ee5c, h\u00e3y ghi l\u1ea1i th\u1eddi \u0111i\u1ec3m x\u1ea3y ra v\u00e0 xem l\u1ed7i c\u00f3 tr\u00f9ng v\u1edbi l\u00fac l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp cao ho\u1eb7c c\u00e1c t\u00e1c v\u1ee5 theo l\u1ecbch hay kh\u00f4ng.<\/p>\n\n<h2 id=\"h-7-review-recent-wordpress-or-hosting-changes\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Xem_lai_nhung_thay_doi_gan_day_doi_voi_WordPress_hoac_hosting\"><\/span>7. Xem l\u1ea1i nh\u1eefng thay \u0111\u1ed5i g\u1ea7n \u0111\u00e2y \u0111\u1ed1i v\u1edbi WordPress ho\u1eb7c hosting<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu trang web c\u1ee7a b\u1ea1n m\u1edbi ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, h\u00e3y ki\u1ec3m tra nh\u1eefng g\u00ec \u0111\u00e3 thay \u0111\u1ed5i ngay tr\u01b0\u1edbc khi s\u1ef1 c\u1ed1 xu\u1ea5t hi\u1ec7n.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Chuy\u1ec3n trang web sang m\u00f4i tr\u01b0\u1eddng m\u1edbi:<\/strong> X\u00e1c nh\u1eadn r\u1eb1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c nh\u1eadp v\u00e0 <code>wp-config.php<\/code> ch\u1ee9a th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u00f9ng t\u00ean m\u00e1y ch\u1ee7 m\u1edbi.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Thay \u0111\u1ed5i m\u1eadt kh\u1ea9u:<\/strong> \u0110\u1ea3m b\u1ea3o WordPress \u0111ang s\u1eed d\u1ee5ng m\u1eadt kh\u1ea9u c\u01a1 s\u1edf d\u1eef li\u1ec7u hi\u1ec7n t\u1ea1i.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Thay \u0111\u1ed5i hosting:<\/strong> X\u00e1c minh r\u1eb1ng d\u1ecbch v\u1ee5 c\u01a1 s\u1edf d\u1eef li\u1ec7u, t\u00ean m\u00e1y ch\u1ee7 v\u00e0 quy\u1ec1n c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh ch\u00ednh x\u00e1c.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Thay \u0111\u1ed5i plugin ho\u1eb7c \u1ee9ng d\u1ee5ng:<\/strong> Ki\u1ec3m tra xem qu\u00e1 nhi\u1ec1u truy v\u1ea5n ho\u1eb7c k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 \u0111ang \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng truy c\u1eadp hay kh\u00f4ng.<\/p>\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\">WordPress ho\u1ea1t \u0111\u1ed9ng v\u1edbi c\u1ea3 MySQL v\u00e0 MariaDB, nh\u01b0ng kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch c\u00f3 th\u1ec3 l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng khi chuy\u1ec3n sang m\u00f4i tr\u01b0\u1eddng m\u1edbi. B\u00e0i <a href=\"https:\/\/zynoo.com\/blog\/vi\/mariadb-vs-mysql\/\">so s\u00e1nh MariaDB v\u00e0 MySQL<\/a> c\u1ee7a ch\u00fang t\u00f4i gi\u1ea3i th\u00edch s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u00fang v\u00e0 nh\u1eefng \u0111i\u1ec1u c\u1ea7n c\u00e2n nh\u1eafc tr\u01b0\u1edbc khi chuy\u1ec3n \u0111\u1ed5i.<\/p>\n<\/div>\n\n<h2 id=\"h-what-if-the-error-still-appears\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Neu_loi_van_xuat_hien_thi_sao\"><\/span>N\u1ebfu l\u1ed7i v\u1eabn xu\u1ea5t hi\u1ec7n th\u00ec sao?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu kh\u00f4ng b\u01b0\u1edbc n\u00e0o \u1edf tr\u00ean gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1, h\u00e3y li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p hosting c\u1ee7a b\u1ea1n.<\/p>\n\n<p class=\"wp-block-paragraph\">H\u00e3y cung c\u1ea5p th\u1eddi \u0111i\u1ec3m g\u1ea7n \u0111\u00fang khi s\u1ef1 c\u1ed1 b\u1eaft \u0111\u1ea7u, cho bi\u1ebft l\u1ed7i x\u1ea3y ra li\u00ean t\u1ee5c hay kh\u00f4ng li\u00ean t\u1ee5c, c\u00f9ng m\u1ecdi thay \u0111\u1ed5i g\u1ea7n \u0111\u00e2y \u0111\u1ed1i v\u1edbi trang web c\u1ee7a b\u1ea1n.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u00eau r\u00f5 nh\u1eefng b\u01b0\u1edbc ki\u1ec3m tra v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 b\u1ea1n \u0111\u00e3 th\u1ef1c hi\u1ec7n. \u0110\u1eebng bao gi\u1edd g\u1eedi m\u1eadt kh\u1ea9u c\u01a1 s\u1edf d\u1eef li\u1ec7u qua c\u00e1c tin nh\u1eafn h\u1ed7 tr\u1ee3 th\u00f4ng th\u01b0\u1eddng.<\/p>\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 t\u00ecm hi\u1ec3u c\u00e1c s\u1ef1 c\u1ed1 trang web ph\u1ed5 bi\u1ebfn kh\u00e1c, h\u00e3y xem h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/zynoo.com\/blog\/30-most-common-wordpress-errors-and-how-to-fix-them\/\">30 l\u1ed7i WordPress v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/a>.<\/p>\n<\/div>\n\n<h2 id=\"h-how-to-prevent-future-database-connection-problems\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cach_phong_tranh_su_co_ket_noi_co_so_du_lieu_trong_tuong_lai\"><\/span>C\u00e1ch ph\u00f2ng tr\u00e1nh s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong t\u01b0\u01a1ng lai<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng th\u1ec3 ng\u0103n ch\u1eb7n m\u1ecdi l\u1ea7n gi\u00e1n \u0111o\u1ea1n ho\u1ea1t \u0111\u1ed9ng, nh\u01b0ng vi\u1ec7c b\u1ea3o tr\u00ec t\u1ed1t c\u00f3 th\u1ec3 gi\u1ea3m nh\u1eefng s\u1ef1 c\u1ed1 c\u00f3 th\u1ec3 tr\u00e1nh \u0111\u01b0\u1ee3c.<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Sao l\u01b0u trang web v\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u th\u01b0\u1eddng xuy\u00ean.<\/li>\n\n\n\n<li>Lu\u00f4n c\u1eadp nh\u1eadt WordPress, giao di\u1ec7n v\u00e0 plugin.<\/li>\n\n\n\n<li>Theo d\u00f5i c\u00e1c k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 m\u1ee9c s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean.<\/li>\n\n\n\n<li>Duy tr\u00ec \u0111\u1ee7 dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef tr\u00ean m\u00e1y ch\u1ee7.<\/li>\n\n\n\n<li>Ki\u1ec3m th\u1eed vi\u1ec7c chuy\u1ec3n trang web sang m\u00f4i tr\u01b0\u1eddng m\u1edbi tr\u01b0\u1edbc khi chuy\u1ec3n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp th\u1ef1c t\u1ebf.<\/li>\n\n\n\n<li>B\u1ea3o m\u1eadt th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/li>\n\n\n\n<li>Theo d\u00f5i t\u00ecnh tr\u1ea1ng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a d\u1ecbch v\u1ee5 c\u01a1 s\u1edf d\u1eef li\u1ec7u tr\u00ean c\u00e1c m\u00e1y ch\u1ee7 t\u1ef1 qu\u1ea3n l\u00fd.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng bi\u1ec7n ph\u00e1p n\u00e0y gi\u00fap gi\u1ea3m kh\u1ea3 n\u0103ng x\u1ea3y ra s\u1ef1 c\u1ed1 c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1ea5t ng\u1edd kh\u00f4ng kh\u1ea3 d\u1ee5ng.<\/p>\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1793356685500\"><strong class=\"schema-faq-question\">L\u1ed7i n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u WordPress c\u1ee7a t\u00f4i \u0111\u00e3 b\u1ecb x\u00f3a kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Kh\u00f4ng. L\u1ed7i n\u00e0y cho bi\u1ebft WordPress kh\u00f4ng th\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i. C\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 n\u1ed9i dung trong \u0111\u00f3 c\u00f3 th\u1ec3 v\u1eabn c\u00f2n nguy\u00ean.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793356703373\"><strong class=\"schema-faq-question\">Plugin WordPress c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u00f3, nh\u01b0ng l\u00e0 gi\u00e1n ti\u1ebfp. M\u1ed9t plugin \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u k\u00e9m c\u00f3 th\u1ec3 t\u1ea1o ra qu\u00e1 nhi\u1ec1u truy v\u1ea5n ho\u1eb7c k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u, g\u00f3p ph\u1ea7n l\u00e0m c\u1ea1n ki\u1ec7t t\u00e0i nguy\u00ean.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793356714422\"><strong class=\"schema-faq-question\">T\u00f4i c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c l\u1ed7i m\u00e0 kh\u00f4ng c\u1ea7n truy c\u1eadp wp-admin kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u00f3. H\u1ea7u h\u1ebft c\u00e1c b\u01b0\u1edbc ki\u1ec3m tra v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n qua b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n hosting, Tr\u00ecnh qu\u1ea3n l\u00fd t\u1ec7p, SFTP ho\u1eb7c SSH.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793356728760\"><strong class=\"schema-faq-question\">T\u00f4i c\u00f3 n\u00ean c\u00e0i \u0111\u1eb7t l\u1ea1i WordPress \u0111\u1ec3 kh\u1eafc ph\u1ee5c l\u1ed7i n\u00e0y kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Th\u01b0\u1eddng l\u00e0 kh\u00f4ng. C\u00e0i \u0111\u1eb7t l\u1ea1i WordPress s\u1ebd kh\u00f4ng s\u1eeda \u0111\u01b0\u1ee3c th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u hay kh\u00f4i ph\u1ee5c d\u1ecbch v\u1ee5 c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e3 d\u1eebng, v\u00e0 nh\u1eefng thay \u0111\u1ed5i kh\u00f4ng c\u1ea7n thi\u1ebft c\u00f3 th\u1ec3 g\u00e2y th\u00eam v\u1ea5n \u0111\u1ec1.<\/p> <\/div> <\/div>\n\n<h2 id=\"h-conclusion\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 kh\u1eafc ph\u1ee5c <strong>l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/strong> trong WordPress, tr\u01b0\u1edbc ti\u00ean h\u00e3y x\u00e1c minh th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u, t\u00ean m\u00e1y ch\u1ee7 v\u00e0 t\u00ecnh tr\u1ea1ng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y ch\u1ee7.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu c\u00e1c thi\u1ebft l\u1eadp \u0111\u00f3 ch\u00ednh x\u00e1c, h\u00e3y ki\u1ec3m tra quy\u1ec1n truy c\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u, gi\u1edbi h\u1ea1n t\u00e0i nguy\u00ean v\u00e0 nh\u1eefng thay \u0111\u1ed5i c\u1ea5u h\u00ecnh g\u1ea7n \u0111\u00e2y tr\u01b0\u1edbc khi th\u1eed s\u1eeda ch\u1eefa.<\/p>\n\n<p class=\"wp-block-paragraph\">H\u00e3y ki\u1ec3m tra t\u1eebng m\u1ee5c m\u1ed9t c\u00e1ch c\u00f3 h\u1ec7 th\u1ed1ng v\u00e0 li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p hosting n\u1ebfu c\u1ea7n ki\u1ec3m tra d\u1ecbch v\u1ee5 c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u1eb7c h\u1ea1 t\u1ea7ng m\u00e1y ch\u1ee7.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Th\u00f4ng b\u00e1o \u201cl\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u\u201d trong WordPress c\u00f3 ngh\u0129a l\u00e0 trang web c\u1ee7a b\u1ea1n kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u MySQL ho\u1eb7c MariaDB. C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u1ed3m th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng ch\u00ednh x\u00e1c, m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4686,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[658],"tags":[664,770],"class_list":["post-4684","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-huong-dan-wordpress","tag-huong-dan","tag-loi-thiet-lap-ket-noi-co-so-du-lieu"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress<\/title>\n<meta name=\"description\" content=\"Kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch ki\u1ec3m tra th\u00f4ng tin \u0111\u0103ng nh\u1eadp, wp-config.php, tr\u1ea1ng th\u00e1i m\u00e1y ch\u1ee7 v\u00e0 c\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn kh\u00e1c.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress\" \/>\n<meta property=\"og:description\" content=\"Kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch ki\u1ec3m tra th\u00f4ng tin \u0111\u0103ng nh\u1eadp, wp-config.php, tr\u1ea1ng th\u00e1i m\u00e1y ch\u1ee7 v\u00e0 c\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn kh\u00e1c.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/\" \/>\n<meta property=\"og:site_name\" content=\"ZYNOO Blog\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-11T20:11:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-30T10:52:30+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-database-connection-error.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1600\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Jamie Collins\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jamie Collins\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/\"},\"author\":{\"name\":\"Jamie Collins\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/#\\\/schema\\\/person\\\/075b85b8be75fb370da34891a96e7eba\"},\"headline\":\"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress\",\"datePublished\":\"2025-09-11T20:11:00+00:00\",\"dateModified\":\"2026-10-30T10:52:30+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/\"},\"wordCount\":3311,\"publisher\":{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/09\\\/wordpress-database-connection-error.webp\",\"keywords\":[\"h\u01b0\u1edbng d\u1eabn\",\"l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u\"],\"articleSection\":[\"H\u01b0\u1edbng d\u1eabn WordPress\"],\"inLanguage\":\"vi\"},{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/\",\"url\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/\",\"name\":\"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/09\\\/wordpress-database-connection-error.webp\",\"datePublished\":\"2025-09-11T20:11:00+00:00\",\"dateModified\":\"2026-10-30T10:52:30+00:00\",\"description\":\"Kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch ki\u1ec3m tra th\u00f4ng tin \u0111\u0103ng nh\u1eadp, wp-config.php, tr\u1ea1ng th\u00e1i m\u00e1y ch\u1ee7 v\u00e0 c\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn kh\u00e1c.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#breadcrumb\"},\"mainEntity\":[{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356685500\"},{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356703373\"},{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356714422\"},{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356728760\"}],\"inLanguage\":\"vi\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#primaryimage\",\"url\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/09\\\/wordpress-database-connection-error.webp\",\"contentUrl\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/09\\\/wordpress-database-connection-error.webp\",\"width\":1600,\"height\":900,\"caption\":\"l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"D\u1ecbch v\u1ee5 l\u01b0u tr\u1eef web\",\"item\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/category\\\/dich-vu-luu-tru-web\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/#website\",\"url\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/\",\"name\":\"Zynoo Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"vi\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/#organization\",\"name\":\"ZYNOO\",\"url\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/logo.png\",\"contentUrl\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/logo.png\",\"width\":149,\"height\":31,\"caption\":\"ZYNOO\"},\"image\":{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/#\\\/schema\\\/person\\\/075b85b8be75fb370da34891a96e7eba\",\"name\":\"Jamie Collins\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c9359158623ddee86ac8561e84de70f78b722c1d9018dd61d611ae19118a2d76?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c9359158623ddee86ac8561e84de70f78b722c1d9018dd61d611ae19118a2d76?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c9359158623ddee86ac8561e84de70f78b722c1d9018dd61d611ae19118a2d76?s=96&d=mm&r=g\",\"caption\":\"Jamie Collins\"},\"description\":\"Jamie Collins is a content writer with over 5+ years of experience in web hosting. He specializes in creating simple, practical guides that help readers understand hosting and make smarter online choices.\",\"sameAs\":[\"https:\\\/\\\/zynoo.com\\\/blog\\\/\"],\"url\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/author\\\/willy\\\/\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356685500\",\"position\":1,\"url\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356685500\",\"name\":\"L\u1ed7i n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u WordPress c\u1ee7a t\u00f4i \u0111\u00e3 b\u1ecb x\u00f3a kh\u00f4ng?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Kh\u00f4ng. L\u1ed7i n\u00e0y cho bi\u1ebft WordPress kh\u00f4ng th\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i. C\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 n\u1ed9i dung trong \u0111\u00f3 c\u00f3 th\u1ec3 v\u1eabn c\u00f2n nguy\u00ean.\",\"inLanguage\":\"vi\"},\"inLanguage\":\"vi\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356703373\",\"position\":2,\"url\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356703373\",\"name\":\"Plugin WordPress c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"C\u00f3, nh\u01b0ng l\u00e0 gi\u00e1n ti\u1ebfp. M\u1ed9t plugin \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u k\u00e9m c\u00f3 th\u1ec3 t\u1ea1o ra qu\u00e1 nhi\u1ec1u truy v\u1ea5n ho\u1eb7c k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u, g\u00f3p ph\u1ea7n l\u00e0m c\u1ea1n ki\u1ec7t t\u00e0i nguy\u00ean.\",\"inLanguage\":\"vi\"},\"inLanguage\":\"vi\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356714422\",\"position\":3,\"url\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356714422\",\"name\":\"T\u00f4i c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c l\u1ed7i m\u00e0 kh\u00f4ng c\u1ea7n truy c\u1eadp wp-admin kh\u00f4ng?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"C\u00f3. H\u1ea7u h\u1ebft c\u00e1c b\u01b0\u1edbc ki\u1ec3m tra v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n qua b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n hosting, Tr\u00ecnh qu\u1ea3n l\u00fd t\u1ec7p, SFTP ho\u1eb7c SSH.\",\"inLanguage\":\"vi\"},\"inLanguage\":\"vi\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356728760\",\"position\":4,\"url\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/error-establishing-a-database-connection\\\/#faq-question-1793356728760\",\"name\":\"T\u00f4i c\u00f3 n\u00ean c\u00e0i \u0111\u1eb7t l\u1ea1i WordPress \u0111\u1ec3 kh\u1eafc ph\u1ee5c l\u1ed7i n\u00e0y kh\u00f4ng?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Th\u01b0\u1eddng l\u00e0 kh\u00f4ng. C\u00e0i \u0111\u1eb7t l\u1ea1i WordPress s\u1ebd kh\u00f4ng s\u1eeda \u0111\u01b0\u1ee3c th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u hay kh\u00f4i ph\u1ee5c d\u1ecbch v\u1ee5 c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e3 d\u1eebng, v\u00e0 nh\u1eefng thay \u0111\u1ed5i kh\u00f4ng c\u1ea7n thi\u1ebft c\u00f3 th\u1ec3 g\u00e2y th\u00eam v\u1ea5n \u0111\u1ec1.\",\"inLanguage\":\"vi\"},\"inLanguage\":\"vi\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress","description":"Kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch ki\u1ec3m tra th\u00f4ng tin \u0111\u0103ng nh\u1eadp, wp-config.php, tr\u1ea1ng th\u00e1i m\u00e1y ch\u1ee7 v\u00e0 c\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn kh\u00e1c.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/","og_locale":"vi_VN","og_type":"article","og_title":"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress","og_description":"Kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch ki\u1ec3m tra th\u00f4ng tin \u0111\u0103ng nh\u1eadp, wp-config.php, tr\u1ea1ng th\u00e1i m\u00e1y ch\u1ee7 v\u00e0 c\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn kh\u00e1c.","og_url":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/","og_site_name":"ZYNOO Blog","article_published_time":"2025-09-11T20:11:00+00:00","article_modified_time":"2026-10-30T10:52:30+00:00","og_image":[{"width":1600,"height":900,"url":"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-database-connection-error.webp","type":"image\/webp"}],"author":"Jamie Collins","twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"Jamie Collins","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"6 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"TechArticle","@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#article","isPartOf":{"@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/"},"author":{"name":"Jamie Collins","@id":"https:\/\/zynoo.com\/blog\/vi\/#\/schema\/person\/075b85b8be75fb370da34891a96e7eba"},"headline":"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress","datePublished":"2025-09-11T20:11:00+00:00","dateModified":"2026-10-30T10:52:30+00:00","mainEntityOfPage":{"@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/"},"wordCount":3311,"publisher":{"@id":"https:\/\/zynoo.com\/blog\/vi\/#organization"},"image":{"@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#primaryimage"},"thumbnailUrl":"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-database-connection-error.webp","keywords":["h\u01b0\u1edbng d\u1eabn","l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u"],"articleSection":["H\u01b0\u1edbng d\u1eabn WordPress"],"inLanguage":"vi"},{"@type":["WebPage","FAQPage"],"@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/","url":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/","name":"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress","isPartOf":{"@id":"https:\/\/zynoo.com\/blog\/vi\/#website"},"primaryImageOfPage":{"@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#primaryimage"},"image":{"@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#primaryimage"},"thumbnailUrl":"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-database-connection-error.webp","datePublished":"2025-09-11T20:11:00+00:00","dateModified":"2026-10-30T10:52:30+00:00","description":"Kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch ki\u1ec3m tra th\u00f4ng tin \u0111\u0103ng nh\u1eadp, wp-config.php, tr\u1ea1ng th\u00e1i m\u00e1y ch\u1ee7 v\u00e0 c\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn kh\u00e1c.","breadcrumb":{"@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#breadcrumb"},"mainEntity":[{"@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356685500"},{"@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356703373"},{"@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356714422"},{"@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356728760"}],"inLanguage":"vi","potentialAction":[{"@type":"ReadAction","target":["https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/"]}]},{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#primaryimage","url":"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-database-connection-error.webp","contentUrl":"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2021\/09\/wordpress-database-connection-error.webp","width":1600,"height":900,"caption":"l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u"},{"@type":"BreadcrumbList","@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/zynoo.com\/blog\/vi\/"},{"@type":"ListItem","position":2,"name":"D\u1ecbch v\u1ee5 l\u01b0u tr\u1eef web","item":"https:\/\/zynoo.com\/blog\/vi\/category\/dich-vu-luu-tru-web\/"},{"@type":"ListItem","position":3,"name":"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u trong WordPress"}]},{"@type":"WebSite","@id":"https:\/\/zynoo.com\/blog\/vi\/#website","url":"https:\/\/zynoo.com\/blog\/vi\/","name":"Zynoo Blog","description":"","publisher":{"@id":"https:\/\/zynoo.com\/blog\/vi\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/zynoo.com\/blog\/vi\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"vi"},{"@type":"Organization","@id":"https:\/\/zynoo.com\/blog\/vi\/#organization","name":"ZYNOO","url":"https:\/\/zynoo.com\/blog\/vi\/","logo":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/zynoo.com\/blog\/vi\/#\/schema\/logo\/image\/","url":"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2025\/08\/logo.png","contentUrl":"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2025\/08\/logo.png","width":149,"height":31,"caption":"ZYNOO"},"image":{"@id":"https:\/\/zynoo.com\/blog\/vi\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/zynoo.com\/blog\/vi\/#\/schema\/person\/075b85b8be75fb370da34891a96e7eba","name":"Jamie Collins","image":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/secure.gravatar.com\/avatar\/c9359158623ddee86ac8561e84de70f78b722c1d9018dd61d611ae19118a2d76?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9359158623ddee86ac8561e84de70f78b722c1d9018dd61d611ae19118a2d76?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/c9359158623ddee86ac8561e84de70f78b722c1d9018dd61d611ae19118a2d76?s=96&d=mm&r=g","caption":"Jamie Collins"},"description":"Jamie Collins is a content writer with over 5+ years of experience in web hosting. He specializes in creating simple, practical guides that help readers understand hosting and make smarter online choices.","sameAs":["https:\/\/zynoo.com\/blog\/"],"url":"https:\/\/zynoo.com\/blog\/vi\/author\/willy\/"},{"@type":"Question","@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356685500","position":1,"url":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356685500","name":"L\u1ed7i n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u WordPress c\u1ee7a t\u00f4i \u0111\u00e3 b\u1ecb x\u00f3a kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Kh\u00f4ng. L\u1ed7i n\u00e0y cho bi\u1ebft WordPress kh\u00f4ng th\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i. C\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 n\u1ed9i dung trong \u0111\u00f3 c\u00f3 th\u1ec3 v\u1eabn c\u00f2n nguy\u00ean.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356703373","position":2,"url":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356703373","name":"Plugin WordPress c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"C\u00f3, nh\u01b0ng l\u00e0 gi\u00e1n ti\u1ebfp. M\u1ed9t plugin \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u k\u00e9m c\u00f3 th\u1ec3 t\u1ea1o ra qu\u00e1 nhi\u1ec1u truy v\u1ea5n ho\u1eb7c k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u, g\u00f3p ph\u1ea7n l\u00e0m c\u1ea1n ki\u1ec7t t\u00e0i nguy\u00ean.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356714422","position":3,"url":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356714422","name":"T\u00f4i c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c l\u1ed7i m\u00e0 kh\u00f4ng c\u1ea7n truy c\u1eadp wp-admin kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"C\u00f3. H\u1ea7u h\u1ebft c\u00e1c b\u01b0\u1edbc ki\u1ec3m tra v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n qua b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n hosting, Tr\u00ecnh qu\u1ea3n l\u00fd t\u1ec7p, SFTP ho\u1eb7c SSH.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356728760","position":4,"url":"https:\/\/zynoo.com\/blog\/vi\/error-establishing-a-database-connection\/#faq-question-1793356728760","name":"T\u00f4i c\u00f3 n\u00ean c\u00e0i \u0111\u1eb7t l\u1ea1i WordPress \u0111\u1ec3 kh\u1eafc ph\u1ee5c l\u1ed7i n\u00e0y kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Th\u01b0\u1eddng l\u00e0 kh\u00f4ng. C\u00e0i \u0111\u1eb7t l\u1ea1i WordPress s\u1ebd kh\u00f4ng s\u1eeda \u0111\u01b0\u1ee3c th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u hay kh\u00f4i ph\u1ee5c d\u1ecbch v\u1ee5 c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e3 d\u1eebng, v\u00e0 nh\u1eefng thay \u0111\u1ed5i kh\u00f4ng c\u1ea7n thi\u1ebft c\u00f3 th\u1ec3 g\u00e2y th\u00eam v\u1ea5n \u0111\u1ec1.","inLanguage":"vi"},"inLanguage":"vi"}]}},"_links":{"self":[{"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/posts\/4684","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/comments?post=4684"}],"version-history":[{"count":1,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/posts\/4684\/revisions"}],"predecessor-version":[{"id":4687,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/posts\/4684\/revisions\/4687"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/media\/4686"}],"wp:attachment":[{"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/media?parent=4684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/categories?post=4684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/tags?post=4684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}