{"id":118318,"date":"2025-08-15T17:53:23","date_gmt":"2025-08-15T10:53:23","guid":{"rendered":"https:\/\/tino.vn\/blog\/?p=118318"},"modified":"2026-01-02T17:35:03","modified_gmt":"2026-01-02T10:35:03","slug":"sua-loi-khong-dang-nhap-duoc-wordpress","status":"publish","type":"post","link":"https:\/\/tino.vn\/blog\/sua-loi-khong-dang-nhap-duoc-wordpress\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn c\u00e1ch s\u1eeda l\u1ed7i kh\u00f4ng \u0111\u0103ng nh\u1eadp \u0111\u01b0\u1ee3c WordPress [2026]"},"content":{"rendered":"\n<p><strong>B\u1ea1n \u0111ang loay hoay v\u00ec kh\u00f4ng \u0111\u0103ng nh\u1eadp \u0111\u01b0\u1ee3c <a href=\"https:\/\/tino.vn\/blog\/wordpress-la-gi\/\" target=\"_blank\" data-type=\"post\" data-id=\"15589\" rel=\"noreferrer noopener\">WordPress<\/a> c\u0169ng nh\u01b0 kh\u00f4ng bi\u1ebft ph\u1ea3i b\u1eaft \u0111\u1ea7u t\u1eeb \u0111\u00e2u \u0111\u1ec3 kh\u1eafc ph\u1ee5c? \u0110\u1eebng lo l\u1eafng! \u0110\u00e2y l\u00e0 l\u1ed7i ph\u1ed5 bi\u1ebfn m\u00e0 nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng WordPress g\u1eb7p ph\u1ea3i. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n t\u00ecm ra nguy\u00ean nh\u00e2n v\u00e0 c\u00e1ch s\u1eeda l\u1ed7i kh\u00f4ng \u0111\u0103ng nh\u1eadp \u0111\u01b0\u1ee3c WordPress chi ti\u1ebft, \u0111\u1ea3m b\u1ea3o website ho\u1ea1t \u0111\u1ed9ng tr\u1edf l\u1ea1i b\u00ecnh th\u01b0\u1eddng.<\/strong><\/p>\n\n\n\n<h2 id=\"Nguy\u00ean_nh\u00e2n_c\u1ee5_th\u1ec3_v\u00e0_c\u00e1ch_s\u1eeda_l\u1ed7i_kh\u00f4ng_\u0111\u0103ng_nh\u1eadp_\u0111\u01b0\u1ee3c_WordPress_\"><a id=\"post-118318-_ulqczt9zqrwu\"><\/a>Nguy\u00ean nh\u00e2n c\u1ee5 th\u1ec3 v\u00e0 c\u00e1ch s\u1eeda l\u1ed7i kh\u00f4ng \u0111\u0103ng nh\u1eadp \u0111\u01b0\u1ee3c WordPress <\/h2>\n\n\n\n<h3 id=\"Qu\u00ean_ho\u1eb7c_m\u1ea5t_m\u1eadt_kh\u1ea9u_WordPress\"><a id=\"post-118318-_3i3f9pz1833b\"><\/a><strong>Qu\u00ean ho\u1eb7c m\u1ea5t m\u1eadt kh\u1ea9u WordPress<\/strong><\/h3>\n\n\n\n<p>\u0110\u00e2y l\u00e0 l\u1ed7i c\u01a1 b\u1ea3n nh\u01b0ng c\u0169ng r\u1ea5t ph\u1ed5 bi\u1ebfn. N\u1ebfu b\u1ea1n th\u01b0\u1eddng xuy\u00ean \u0111\u1ed5i m\u1eadt kh\u1ea9u \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt, vi\u1ec7c qu\u00ean m\u1eadt kh\u1ea9u l\u00e0 \u0111i\u1ec1u d\u1ec5 x\u1ea3y ra. WordPress c\u00f3 s\u1eb5n t\u00ednh n\u0103ng \u0111\u1eb7t l\u1ea1i m\u1eadt kh\u1ea9u, nh\u01b0ng \u0111\u00f4i khi c\u00f3 th\u1ec3 g\u1eb7p tr\u1ee5c tr\u1eb7c trong qu\u00e1 tr\u00ecnh n\u00e0y.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-1.png\" alt=\"Qu\u00ean ho\u1eb7c m\u1ea5t m\u1eadt kh\u1ea9u WordPress\" class=\"wp-image-118336\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-1.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-1-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>Qu\u00ean ho\u1eb7c m\u1ea5t m\u1eadt kh\u1ea9u WordPress<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><strong>C\u00e1ch kh\u00f4i ph\u1ee5c m\u1eadt kh\u1ea9u b\u1ecb m\u1ea5t ho\u1eb7c qu\u00ean<\/strong>:<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 1:<\/strong> Tr\u00ean trang \u0111\u0103ng nh\u1eadp, nh\u1ea5p v\u00e0o &#8220;<strong>Lost your password?<\/strong>&#8221; (Qu\u00ean m\u1eadt kh\u1ea9u?).<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2:<\/strong> Nh\u1eadp email \u0111\u1ec3 nh\u1eadn li\u00ean k\u1ebft \u0111\u1eb7t l\u1ea1i m\u1eadt kh\u1ea9u.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-2.png\" alt=\"C\u00e1ch kh\u00f4i ph\u1ee5c m\u1eadt kh\u1ea9u b\u1ecb m\u1ea5t ho\u1eb7c qu\u00ean\" class=\"wp-image-118337\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-2.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-2-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>C\u00e1ch kh\u00f4i ph\u1ee5c m\u1eadt kh\u1ea9u b\u1ecb m\u1ea5t ho\u1eb7c qu\u00ean<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p><strong>N\u1ebfu b\u1ea1n kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c email (th\u01b0\u1eddng l\u00e0 kh\u00f4ng), h\u00e3y th\u1eed:<\/strong><\/p>\n\n\n\n<p><strong>C\u00e1ch 1:<\/strong> Ki\u1ec3m tra tr\u00ecnh duy\u1ec7t ho\u1eb7c thi\u1ebft b\u1ecb kh\u00e1c m\u00e0 b\u1ea1n t\u1eebng \u0111\u0103ng nh\u1eadp. N\u1ebfu v\u1eabn c\u00f2n phi\u00ean \u0111\u0103ng nh\u1eadp, h\u00e3y \u0111\u1ed5i m\u1eadt kh\u1ea9u t\u1eeb b\u1ea3ng qu\u1ea3n tr\u1ecb.<\/p>\n\n\n\n<p><strong>C\u00e1ch 2: <\/strong>Truy c\u1eadp tr\u1ef1c ti\u1ebfp v\u00e0o c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng phpMyAdmin (h\u1ea7u h\u1ebft c\u00e1c nh\u00e0 cung c\u1ea5p hosting \u0111\u1ec1u h\u1ed7 tr\u1ee3).<\/p>\n\n\n\n<p><strong>H\u01b0\u1edbng d\u1eabn \u0111\u1ed5i m\u1eadt kh\u1ea9u b\u1eb1ng phpMyAdmin:<\/strong><\/p>\n\n\n\n<p>M\u1edf phpMyAdmin th\u00f4ng qua cPanel v\u00e0 ch\u1ecdn c\u01a1 s\u1edf d\u1eef li\u1ec7u website.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-3.png\" alt=\"H\u01b0\u1edbng d\u1eabn \u0111\u1ed5i m\u1eadt kh\u1ea9u b\u1eb1ng phpMyAdmin\" class=\"wp-image-118340\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-3.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-3-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>H\u01b0\u1edbng d\u1eabn \u0111\u1ed5i m\u1eadt kh\u1ea9u b\u1eb1ng phpMyAdmin<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>T\u00ecm b\u1ea3ng <strong>wp_users<\/strong> \u2192 Ch\u1ecdn <strong>Edit <\/strong>t\u00e0i kho\u1ea3n c\u1ee7a b\u1ea1n.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-4.png\" alt=\"H\u01b0\u1edbng d\u1eabn \u0111\u1ed5i m\u1eadt kh\u1ea9u b\u1eb1ng phpMyAdmin\" class=\"wp-image-118339\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-4.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-4-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>H\u01b0\u1edbng d\u1eabn \u0111\u1ed5i m\u1eadt kh\u1ea9u b\u1eb1ng phpMyAdmin<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>\u1ede c\u1ed9t <strong>user_pass<\/strong>, nh\u1eadp m\u1eadt kh\u1ea9u m\u1edbi (d\u1ea1ng v\u0103n b\u1ea3n) v\u00e0 ch\u1ecdn m\u00e3 h\u00f3a MD5 t\u1eeb menu th\u1ea3 xu\u1ed1ng.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-5.png\" alt=\"H\u01b0\u1edbng d\u1eabn \u0111\u1ed5i m\u1eadt kh\u1ea9u b\u1eb1ng phpMyAdmin\" class=\"wp-image-118338\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-5.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-5-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>H\u01b0\u1edbng d\u1eabn \u0111\u1ed5i m\u1eadt kh\u1ea9u b\u1eb1ng phpMyAdmin<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>Nh\u1ea5n <strong>Go (Th\u1ef1c hi\u1ec7n) <\/strong>\u0111\u1ec3 l\u01b0u thay \u0111\u1ed5i.<\/p>\n\n\n\n<h3 id=\"L\u1ed7i_do_cache_v\u00e0_cookie_tr\u00ecnh_duy\u1ec7t\"><a id=\"post-118318-_pdlhd8hjme62\"><\/a><strong>L\u1ed7i do cache v\u00e0 cookie tr\u00ecnh duy\u1ec7t<\/strong><\/h3>\n\n\n\n<p>WordPress y\u00eau c\u1ea7u cookie \u0111\u1ec3 x\u1eed l\u00fd \u0111\u0103ng nh\u1eadp. N\u1ebfu tr\u00ecnh duy\u1ec7t kh\u00f4ng b\u1eadt cookie ho\u1eb7c b\u1ed9 nh\u1edb cache l\u01b0u d\u1eef li\u1ec7u c\u0169, b\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p l\u1ed7i \u0111\u0103ng nh\u1eadp.<\/p>\n\n\n\n<p><strong>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/strong><\/p>\n\n\n\n<p>X\u00f3a cache v\u00e0 cookie trang web tr\u00ean tr\u00ecnh duy\u1ec7t (Chrome, Firefox, Safari,&#8230;)<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 1: <\/strong>V\u00e0o <strong>C\u00e0i \u0111\u1eb7t<\/strong> -&gt; <strong>Quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt.<\/strong><\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2:<\/strong> Ch\u1ecdn <strong>Xem quy\u1ec1n v\u00e0 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u00ean trang web<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-6.png\" alt=\"L\u1ed7i do cache v\u00e0 cookie tr\u00ecnh duy\u1ec7t\" class=\"wp-image-118341\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-6.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-6-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i do cache v\u00e0 cookie tr\u00ecnh duy\u1ec7t<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 3: <\/strong>Ch\u1ecdn<strong> C\u00e0i \u0111\u1eb7t trang web<\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-7.png\" alt=\"L\u1ed7i do cache v\u00e0 cookie tr\u00ecnh duy\u1ec7t\" class=\"wp-image-118342\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-7.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-7-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i do cache v\u00e0 cookie tr\u00ecnh duy\u1ec7t<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>T\u00ecm t\u00ean trang web r\u1ed3i nh\u1ea5n v\u00e0o <strong>bi\u1ec3u t\u01b0\u1ee3ng th\u00f9ng r\u00e1c<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-8.png\" alt=\"L\u1ed7i do cache v\u00e0 cookie tr\u00ecnh duy\u1ec7t\" class=\"wp-image-118343\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-8.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-8-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i do cache v\u00e0 cookie tr\u00ecnh duy\u1ec7t<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 4:<\/strong> Th\u00eam \u0111o\u1ea1n m\u00e3 sau v\u00e0o t\u1ec7p <strong>wp-config.php<\/strong> (m\u1edf t\u1eeb t\u1ec7p <strong>public_html<\/strong> th\u00f4ng qua FTP ho\u1eb7c File Manager c\u1ee7a cPanel):<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>define('COOKIE_DOMAIN', false);<\/code><\/pre>\n\n\n\n<p><strong>B\u01b0\u1edbc 5: <\/strong>T\u1eaft tr\u00ecnh duy\u1ec7t v\u00e0 m\u1edf l\u1ea1i r\u1ed3i th\u1eed \u0111\u0103ng nh\u1eadp v\u00e0o trang web c\u1ee7a b\u1ea1n \u0111\u1ec3 ki\u1ec3m tra.<\/p>\n\n\n\n<h3 id=\"L\u1ed7i_do_xung_\u0111\u1ed9t_plugin\"><a id=\"post-118318-_oiai8mlk2dpd\"><\/a><strong>L\u1ed7i do xung \u0111\u1ed9t plugin<\/strong><\/h3>\n\n\n\n<p>M\u1ed9t s\u1ed1 plugin c\u00f3 th\u1ec3 g\u00e2y xung \u0111\u1ed9t v\u00e0 ch\u1eb7n qu\u00e1 tr\u00ecnh \u0111\u0103ng nh\u1eadp, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi plugin ch\u01b0a \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt ho\u1eb7c kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi phi\u00ean b\u1ea3n WordPress hi\u1ec7n t\u1ea1i.<\/p>\n\n\n\n<p><strong>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/strong><\/p>\n\n\n\n<p>N\u1ebfu c\u00f2n v\u00e0o \u0111\u01b0\u1ee3c admin (<em>tr\u00ean m\u1ed9t tr\u00ecnh duy\u1ec7t kh\u00e1c<\/em>):<\/p>\n\n\n\n<p>V\u00e0o <strong>Plugins<\/strong> \u2192 Ch\u1ecdn <strong>Deactivate All<\/strong> (T\u1eaft to\u00e0n b\u1ed9 plugin).<\/p>\n\n\n\n<p>N\u1ebfu \u0111\u00e3 kh\u00f4ng v\u00e0o \u0111\u01b0\u1ee3c admin n\u1eefa:<\/p>\n\n\n\n<p>B\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng FTP ho\u1eb7c File Manager c\u1ee7a hosting v\u00e0 \u0111\u1ed5i t\u00ean th\u01b0 m\u1ee5c <strong>wp-content\/plugins<\/strong> th\u00e0nh <strong>plugins_old<\/strong> (ho\u1eb7c b\u1ea5t k\u1ef3 t\u00ean n\u00e0o) \u0111\u1ec3 v\u00f4 hi\u1ec7u h\u00f3a to\u00e0n b\u1ed9 plugin.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-9.png\" alt=\"L\u1ed7i do xung \u0111\u1ed9t plugin\" class=\"wp-image-118344\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-9.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-9-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i do xung \u0111\u1ed9t plugin<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p><strong>L\u01b0u \u00fd: <\/strong>N\u1ebfu \u0111\u0103ng nh\u1eadp \u0111\u01b0\u1ee3c sau khi t\u1eaft plugin, h\u00e3y k\u00edch ho\u1ea1t l\u1ea1i t\u1eebng plugin m\u1ed9t \u0111\u1ec3 t\u00ecm ra plugin g\u00e2y l\u1ed7i.<\/p>\n\n\n\n<h3 id=\"L\u1ed7i_do_giao_di\u1ec7n_(theme)\"><a id=\"post-118318-_6b4nfxpzmm47\"><\/a><strong>L\u1ed7i do giao di\u1ec7n (theme)<\/strong><\/h3>\n\n\n\n<p>M\u1ed9t s\u1ed1 theme c\u00f3 th\u1ec3 t\u1ea1o trang \u0111\u0103ng nh\u1eadp t\u00f9y ch\u1ec9nh v\u00e0 g\u00e2y l\u1ed7i khi c\u1eadp nh\u1eadt kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi WordPress.<\/p>\n\n\n\n<p>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n<p>D\u00f9ng FTP ho\u1eb7c File Manager \u0111\u1ec3 truy c\u1eadp th\u01b0 m\u1ee5c <strong>wp-content\/themes<\/strong> v\u00e0 <strong>\u0111\u1ed5i t\u00ean<\/strong> th\u01b0 m\u1ee5c theme \u0111ang d\u00f9ng. L\u00fac n\u00e0y, WordPress s\u1ebd t\u1ef1 \u0111\u1ed9ng chuy\u1ec3n sang theme m\u1eb7c \u0111\u1ecbnh (nh\u01b0 Twenty Twenty-One).<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-10.png\" alt=\"L\u1ed7i do giao di\u1ec7n (theme)\" class=\"wp-image-118345\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-10.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-10-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i do giao di\u1ec7n (theme)<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>N\u1ebfu kh\u00f4ng c\u00f3 theme m\u1eb7c \u0111\u1ecbnh, b\u1ea1n c\u1ea7n t\u1ea3i m\u1ed9t theme m\u1eb7c \u0111\u1ecbnh l\u00ean th\u01b0 m\u1ee5c themes trong wp-content.<\/p>\n\n\n\n<p><strong>L\u01b0u \u00fd:<\/strong> N\u1ebfu \u0111\u0103ng nh\u1eadp \u0111\u01b0\u1ee3c sau khi \u0111\u1ed5i theme, ch\u1ee9ng t\u1ecf theme c\u0169 l\u00e0 nguy\u00ean nh\u00e2n. H\u00e3y c\u1eadp nh\u1eadt ho\u1eb7c \u0111\u1ed5i sang theme kh\u00e1c an to\u00e0n h\u01a1n.<\/p>\n\n\n\n<h3 id=\"L\u1ed7i_file_wp-login.php_b\u1ecb_h\u1ecfng\"><a id=\"post-118318-_fgqa7b9dvech\"><\/a><strong>L\u1ed7i file wp-login.php b\u1ecb h\u1ecfng<\/strong><\/h3>\n\n\n\n<p>N\u1ebfu file wp-login.php b\u1ecb l\u1ed7i ho\u1eb7c m\u1ea5t, b\u1ea1n s\u1ebd kh\u00f4ng th\u1ec3 truy c\u1eadp trang \u0111\u0103ng nh\u1eadp v\u00e0 c\u00f3 th\u1ec3 g\u1eb7p l\u1ed7i 404.<\/p>\n\n\n\n<p>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 1: <\/strong>Sao l\u01b0u website tr\u01b0\u1edbc khi thao t\u00e1c.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2: <\/strong>T\u1ea3i phi\u00ean b\u1ea3n WordPress m\u1edbi nh\u1ea5t t\u1eeb <a href=\"https:\/\/wordpress.org\/download\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">wordpress.org<\/a>.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 3:<\/strong> T\u00ecm file <strong>wp-login.php<\/strong> trong b\u1ea3n t\u1ea3i xu\u1ed1ng v\u00e0 ch\u00e9p \u0111\u00e8 l\u00ean file c\u0169 trong th\u01b0 m\u1ee5c g\u1ed1c c\u1ee7a website (<strong>File Manager\/FTP<\/strong> -&gt;<strong> public_html<\/strong>).<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-11.png\" alt=\"L\u1ed7i file wp-login.php b\u1ecb h\u1ecfng\" class=\"wp-image-118346\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-11.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-11-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i file wp-login.php b\u1ecb h\u1ecfng<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-12.png\" alt=\"L\u1ed7i file wp-login.php b\u1ecb h\u1ecfng\" class=\"wp-image-118347\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-12.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-12-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i file wp-login.php b\u1ecb h\u1ecfng<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 4: <\/strong>Ki\u1ec3m tra l\u1ea1i vi\u1ec7c \u0111\u0103ng nh\u1eadp.<\/p>\n\n\n\n<h3 id=\"L\u1ed7i_URL_trang_web_b\u1ecb_\u0111\u1ed5i_h\u01b0\u1edbng_(Redirect)\"><a id=\"post-118318-_qswnvpw0hom\"><\/a><strong>L\u1ed7i URL trang web b\u1ecb \u0111\u1ed5i h\u01b0\u1edbng (Redirect)<\/strong><\/h3>\n\n\n\n<p>N\u1ebfu URL WordPress ho\u1eb7c URL trang web b\u1ecb sai (do di chuy\u1ec3n website ho\u1eb7c ch\u1ec9nh s\u1eeda nh\u1ea7m trong c\u01a1 s\u1edf d\u1eef li\u1ec7u), b\u1ea1n s\u1ebd b\u1ecb l\u1ed7i kh\u00f4ng truy c\u1eadp \u0111\u01b0\u1ee3c trang qu\u1ea3n tr\u1ecb.<\/p>\n\n\n\n<p>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n<p>M\u1edf file <strong>wp-config.php<\/strong> trong th\u01b0 m\u1ee5c g\u1ed1c th\u00f4ng qua File Manager ho\u1eb7c FTP v\u00e0 th\u00eam \u0111o\u1ea1n m\u00e3 sau:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>define('WP_HOME','http:\/\/example.com');\n\ndefine('WP_SITEURL','http:\/\/example.com');<\/code><\/pre>\n\n\n\n<p><strong>L\u01b0u \u00fd: <\/strong>Thay <strong>example.com<\/strong> b\u1eb1ng \u0111\u1ecba ch\u1ec9 website th\u1ef1c t\u1ebf c\u1ee7a b\u1ea1n.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-13.png\" alt=\"L\u1ed7i URL trang web b\u1ecb \u0111\u1ed5i h\u01b0\u1edbng (Redirect)\" class=\"wp-image-118348\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-13.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-13-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i URL trang web b\u1ecb \u0111\u1ed5i h\u01b0\u1edbng (Redirect)<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p>Tuy nhi\u00ean, \u0111\u00e2y ch\u1ec9 l\u00e0 gi\u1ea3i ph\u00e1p t\u1ea1m th\u1eddi. \u0110\u1ec3 ch\u1ec9nh s\u1eeda v\u0129nh vi\u1ec5n, b\u1ea1n n\u00ean:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>S\u1eeda URL trong file functions.php c\u1ee7a theme.<\/li>\n\n\n\n<li>C\u1eadp nh\u1eadt URL tr\u1ef1c ti\u1ebfp trong c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/li>\n\n\n\n<li>S\u1eed d\u1ee5ng t\u00ednh n\u0103ng \u201crelocate\u201d c\u1ee7a WordPress.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"L\u1ed7i_file_.htaccess_b\u1ecb_h\u1ecfng\"><a id=\"post-118318-_qy1og6g7ryuf\"><\/a><strong>L\u1ed7i file .htaccess b\u1ecb h\u1ecfng<\/strong><\/h3>\n\n\n\n<p>File .htaccess ch\u1ee9a c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7 v\u00e0 d\u1ec5 b\u1ecb l\u1ed7i khi ch\u1ec9nh s\u1eeda kh\u00f4ng \u0111\u00fang.<\/p>\n\n\n\n<p>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 1: <\/strong>D\u00f9ng File Manager ho\u1eb7c FTP truy c\u1eadp th\u01b0 m\u1ee5c g\u1ed1c c\u1ee7a website.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2: <\/strong>T\u1ea3i file <strong>.htaccess <\/strong>v\u1ec1 m\u00e1y t\u00ednh \u0111\u1ec3 sao l\u01b0u v\u00e0 m\u1edf file hi\u1ec7n t\u1ea1i.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-14.png\" alt=\"L\u1ed7i file .htaccess b\u1ecb h\u1ecfng\" class=\"wp-image-118349\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-14.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-14-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i file .htaccess b\u1ecb h\u1ecfng<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>L\u01b0u \u00fd: Trong tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng t\u00ecm th\u1ea5y file, b\u1ea1n v\u00e0o <strong>Settings<\/strong> -&gt; t\u00edch v\u00e0o \u00f4 <strong>Show Hidden Files (dotfiles)<\/strong> \u0111\u1ec3 hi\u1ec7n c\u00e1c file b\u1ecb \u1ea9n.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 3:<\/strong> Thay th\u1ebf b\u1eb1ng \u0111o\u1ea1n m\u00e3 m\u1eb7c \u0111\u1ecbnh sau:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># BEGIN WordPress\n\nRewriteEngine On\n\nRewriteRule .* - &#91;E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]\n\nRewriteBase \/\n\nRewriteRule ^index\\.php$ - &#91;L]\n\nRewriteCond %{REQUEST_FILENAME} !-f\n\nRewriteCond %{REQUEST_FILENAME} !-d\n\nRewriteRule . \/index.php &#91;L]\n\n# END WordPress<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-15.png\" alt=\"L\u1ed7i file .htaccess b\u1ecb h\u1ecfng\" class=\"wp-image-118350\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-15.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-15-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i file .htaccess b\u1ecb h\u1ecfng<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<h3 id=\"L\u1ed7i_k\u1ebft_n\u1ed1i_c\u01a1_s\u1edf_d\u1eef_li\u1ec7u\"><a id=\"post-118318-_uil12cf7lgp4\"><\/a><strong>L\u1ed7i k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/strong><\/h3>\n\n\n\n<p>\u0110\u00f4i khi, WordPress c\u00f3 th\u1ec3 m\u1ea5t k\u1ebft n\u1ed1i v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 hi\u1ec3n th\u1ecb th\u00f4ng b\u00e1o l\u1ed7i li\u00ean quan \u0111\u1ebfn k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u. M\u1eb7c d\u00f9 hi\u1ebfm g\u1eb7p, nh\u01b0ng l\u1ed7i n\u00e0y ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<p><strong>C\u00e1ch kh\u1eafc ph\u1ee5c: <\/strong><\/p>\n\n\n\n<p>K\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t th\u00f4ng qua t\u1ec7p wp-config.php n\u1eb1m trong th\u01b0 m\u1ee5c WordPress.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 1: <\/strong>L\u1ea5y th\u00f4ng tin c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/p>\n\n\n\n<p>Truy c\u1eadp v\u00e0o trang qu\u1ea3n l\u00fd hosting c\u1ee7a b\u1ea1n \u0111\u1ec3 t\u00ecm th\u00f4ng tin chi ti\u1ebft v\u1ec1 c\u01a1 s\u1edf d\u1eef li\u1ec7u. Sau \u0111\u00f3, \u0111\u1ed1i chi\u1ebfu nh\u1eefng th\u00f4ng tin n\u00e0y v\u1edbi t\u1ec7p wp-config.php. C\u00e1c th\u00f4ng tin b\u1ea1n c\u1ea7n bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T\u00ean c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/li>\n\n\n\n<li>Ti\u1ec1n t\u1ed1 b\u1ea3ng d\u1eef li\u1ec7u (table prefix) c\u1ee7a c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/li>\n\n\n\n<li>T\u00ean ng\u01b0\u1eddi d\u00f9ng c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/li>\n\n\n\n<li>M\u1eadt kh\u1ea9u c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/li>\n\n\n\n<li>Host ch\u1ee9a c\u01a1 s\u1edf d\u1eef li\u1ec7u (th\u01b0\u1eddng l\u00e0 &#8220;localhost&#8221;, nh\u01b0ng \u0111\u00f4i khi l\u00e0 \u0111\u1ecba ch\u1ec9 IP c\u1ee5 th\u1ec3)<\/li>\n<\/ul>\n\n\n\n<p><strong>L\u01b0u \u00fd:<\/strong> M\u1ed7i nh\u00e0 cung c\u1ea5p hosting s\u1ebd c\u00f3 c\u00e1ch b\u1ed1 tr\u00ed kh\u00e1c nhau, n\u00ean n\u1ebfu kh\u00f4ng t\u00ecm th\u1ea5y th\u00f4ng tin, b\u1ea1n c\u00f3 th\u1ec3 li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2:<\/strong> Ch\u1ec9nh s\u1eeda t\u1ec7p wp-config.php<\/p>\n\n\n\n<p>M\u1edf t\u1ec7p wp-config.php v\u00e0 t\u00ecm \u0111\u1ebfn c\u00e1c d\u00f2ng sau:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/** T\u00ean c\u01a1 s\u1edf d\u1eef li\u1ec7u cho WordPress *\/\n\ndefine( 'DB_NAME', 'database_name_here' );\n\n\/** T\u00ean ng\u01b0\u1eddi d\u00f9ng c\u01a1 s\u1edf d\u1eef li\u1ec7u *\/\n\ndefine( 'DB_USER', 'username_here' );\n\n\/** M\u1eadt kh\u1ea9u c\u01a1 s\u1edf d\u1eef li\u1ec7u *\/\n\ndefine( 'DB_PASSWORD', 'password_here' );\n\n\/** \u0110\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u *\/\n\ndefine( 'DB_HOST', 'localhost' );\n\n\/** Ti\u1ec1n t\u1ed1 b\u1ea3ng c\u01a1 s\u1edf d\u1eef li\u1ec7u *\/\n\n$table_prefix = 'wp_';<\/code><\/pre>\n\n\n\n<p>Thay th\u1ebf c\u00e1c gi\u00e1 tr\u1ecb <strong>database_name_here<\/strong>,<strong> username_here<\/strong>, <strong>password_here<\/strong> v\u00e0 localhost b\u1eb1ng th\u00f4ng tin ch\u00ednh x\u00e1c t\u1eeb hosting c\u1ee7a b\u1ea1n.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-16.png\" alt=\"L\u1ed7i k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u\" class=\"wp-image-118351\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-16.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-16-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 3:<\/strong> Sau khi ch\u1ec9nh s\u1eeda xong, h\u00e3y l\u01b0u t\u1ec7p l\u1ea1i v\u00e0 th\u1eed truy c\u1eadp l\u1ea1i trang web. N\u1ebfu t\u1ea5t c\u1ea3 th\u00f4ng tin \u0111\u1ec1u ch\u00ednh x\u00e1c, trang web c\u1ee7a b\u1ea1n s\u1ebd ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng tr\u1edf l\u1ea1i.<\/p>\n\n\n\n<h3 id=\"L\u1ed7i_&#8220;Allowed_Memory_Size_Exhausted&#8221;_(L\u1ed7i_h\u1ebft_dung_l\u01b0\u1ee3ng_b\u1ed9_nh\u1edb)\"><a id=\"post-118318-_pd062c9qy086\"><\/a><strong>L\u1ed7i &#8220;Allowed Memory Size Exhausted&#8221; (L\u1ed7i h\u1ebft dung l\u01b0\u1ee3ng b\u1ed9 nh\u1edb)<\/strong><\/h3>\n\n\n\n<p>L\u1ed7i n\u00e0y xu\u1ea5t hi\u1ec7n khi WordPress v\u00e0 c\u00e1c plugin c\u1ea7n nhi\u1ec1u b\u1ed9 nh\u1edb h\u01a1n m\u1ee9c m\u00e0 g\u00f3i hosting c\u1ee7a b\u1ea1n cung c\u1ea5p.<\/p>\n\n\n\n<p><strong>C\u00e1ch kh\u1eafc ph\u1ee5c: <\/strong>T\u0103ng gi\u1edbi h\u1ea1n b\u1ed9 nh\u1edb cho WordPress<\/p>\n\n\n\n<p>B\u1ea1n c\u00f3 th\u1ec3 t\u0103ng dung l\u01b0\u1ee3ng b\u1ed9 nh\u1edb WordPress b\u1eb1ng c\u00e1ch ch\u1ec9nh s\u1eeda t\u1ec7p wp-config.php.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 1: <\/strong>K\u1ebft n\u1ed1i \u0111\u1ebfn website b\u1eb1ng FTP ho\u1eb7c s\u1eed d\u1ee5ng File Manager c\u1ee7a hosting.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2: <\/strong>M\u1edf t\u1ec7p <strong>wp-config.php <\/strong>v\u00e0 th\u00eam d\u00f2ng sau v\u00e0o cu\u1ed1i t\u1ec7p:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>define( 'WP_MEMORY_LIMIT', '512M' );<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"700\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-17.png\" alt=\"L\u1ed7i &quot;Allowed Memory Size Exhausted&quot; (L\u1ed7i h\u1ebft dung l\u01b0\u1ee3ng b\u1ed9 nh\u1edb)\" class=\"wp-image-118352\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-17.png 700w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2025\/08\/sua-loi-khong-dang-nhap-duoc-wordpress-17-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\"><strong>L\u1ed7i &#8220;Allowed Memory Size Exhausted&#8221; (L\u1ed7i h\u1ebft dung l\u01b0\u1ee3ng b\u1ed9 nh\u1edb)<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>Gi\u1ea3i th\u00edch:<\/p>\n\n\n\n<p>D\u00f2ng l\u1ec7nh n\u00e0y s\u1ebd n\u00e2ng gi\u1edbi h\u1ea1n b\u1ed9 nh\u1edb l\u00ean 512MB. Tuy nhi\u00ean, h\u00e3y l\u01b0u \u00fd r\u1eb1ng m\u1ee9c b\u1ed9 nh\u1edb t\u1ed1i \u0111a v\u1eabn do nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 hosting quy\u1ebft \u0111\u1ecbnh. N\u1ebfu h\u1ecd \u0111\u1eb7t gi\u1edbi h\u1ea1n th\u1ea5p h\u01a1n, b\u1ea1n s\u1ebd c\u1ea7n li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p \u0111\u1ec3 x\u00e1c nh\u1eadn ho\u1eb7c y\u00eau c\u1ea7u n\u00e2ng c\u1ea5p g\u00f3i hosting.<\/p>\n\n\n\n<h3 id=\"L\u1ed7i_&#8220;White_Screen_of_Death&#8221;_ho\u1eb7c_500_Internal_Server_Error\"><a id=\"post-118318-_qdilxk3h0q2a\"><\/a><strong>L\u1ed7i &#8220;White Screen of Death&#8221; ho\u1eb7c 500 Internal Server Error<\/strong><\/h3>\n\n\n\n<p>\u0110\u00e2y c\u00f3 th\u1ec3 l\u00e0 c\u01a1n \u00e1c m\u1ed9ng v\u1edbi ch\u1ee7 website, v\u00ec trang ch\u1ec9 hi\u1ec7n m\u1ed9t m\u00e0n h\u00ecnh tr\u1eafng x\u00f3a ho\u1eb7c 500 Internal Server Error m\u00e0 kh\u00f4ng c\u00f3 th\u00f4ng b\u00e1o chi ti\u1ebft. Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn th\u01b0\u1eddng l\u00e0 do xung \u0111\u1ed9t gi\u1eefa plugin ho\u1eb7c theme.<\/p>\n\n\n\n<p><strong>C\u00e1ch kh\u1eafc ph\u1ee5c: <\/strong>T\u1eaft t\u1ea5t c\u1ea3 plugin v\u00e0 \u0111\u1ed5i theme nh\u01b0 h\u01b0\u1edbng d\u1eabn \u1edf nh\u1eefng c\u00e1ch tr\u00ean.<\/p>\n\n\n\n<p>\u0110\u1ec3 t\u00ecm plugin g\u00e2y l\u1ed7i nhanh h\u01a1n, b\u1ea1n h\u00e3y b\u1eadt ch\u1ebf \u0111\u1ed9 g\u1ee1 l\u1ed7i b\u1eb1ng c\u00e1ch th\u00eam v\u00e0o t\u1ec7p <strong>wp-config.php<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>define( 'WP_DEBUG', true );\n\ndefine( 'WP_DEBUG_LOG', true );<\/code><\/pre>\n\n\n\n<p>N\u1ebfu c\u1ea3 plugin v\u00e0 theme \u0111\u1ec1u kh\u00f4ng ph\u1ea3i l\u00e0 nguy\u00ean nh\u00e2n, h\u00e3y li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p hosting \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3.<\/p>\n\n\n\n<h3 id=\"L\u1ed7i_PHP_Syntax_Error_(L\u1ed7i_c\u00fa_ph\u00e1p_PHP)\"><a id=\"post-118318-_wzxuglctafhh\"><\/a><strong>L\u1ed7i PHP Syntax Error (L\u1ed7i c\u00fa ph\u00e1p PHP)<\/strong><\/h3>\n\n\n\n<p>N\u1ebfu b\u1ea1n ch\u1ec9nh s\u1eeda m\u00e3 ngu\u1ed3n (nh\u01b0 t\u1ec7p theme con ho\u1eb7c plugin), r\u1ea5t d\u1ec5 v\u00f4 t\u00ecnh t\u1ea1o ra l\u1ed7i c\u00fa ph\u00e1p PHP. Website c\u00f3 th\u1ec3 hi\u1ec7n th\u00f4ng b\u00e1o l\u1ed7i ngay tr\u00ean trang ho\u1eb7c ch\u1ec9 hi\u1ec3n th\u1ecb m\u00e0n h\u00ecnh tr\u1eafng tr\u1ed1ng tr\u01a1n.<\/p>\n\n\n\n<p>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 1:<\/strong> Truy c\u1eadp website qua FTP ho\u1eb7c File Manager.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2: <\/strong>T\u00ecm \u0111\u1ebfn t\u1ec7p b\u1ea1n v\u1eeba ch\u1ec9nh s\u1eeda (th\u01b0\u1eddng l\u1ed7i s\u1ebd ghi r\u00f5 t\u00ean t\u1ec7p v\u00e0 s\u1ed1 d\u00f2ng g\u1eb7p l\u1ed7i).<\/p>\n\n\n\n<p>Ki\u1ec3m tra v\u00e0 s\u1eeda l\u1ed7i, ch\u00fa \u00fd:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>D\u1ea5u ngo\u1eb7c \u0111\u01a1n\/b\u1ea7u d\u1ee5c thi\u1ebfu ho\u1eb7c th\u1eeba.<\/li>\n\n\n\n<li>D\u1ea5u ch\u1ea5m ph\u1ea9y ; b\u1ecb thi\u1ebfu.<\/li>\n\n\n\n<li>K\u00fd t\u1ef1 l\u1ea1 ho\u1eb7c kho\u1ea3ng tr\u1ed1ng th\u1eeba.<\/li>\n<\/ul>\n\n\n\n<p><strong>M\u1eb9o: <\/strong>N\u1ebfu kh\u00f4ng t\u00ecm ra l\u1ed7i, h\u00e3y kh\u00f4i ph\u1ee5c l\u1ea1i t\u1ec7p v\u1ec1 phi\u00ean b\u1ea3n c\u0169 ho\u1eb7c s\u1eed d\u1ee5ng b\u1ea3n sao l\u01b0u tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n\n\n\n<h3 id=\"K\u1ebft_lu\u1eadn\"><a id=\"post-118318-_3bm63hryx0f3\"><\/a><strong>K\u1ebft lu\u1eadn<\/strong><\/h3>\n\n\n\n<p>L\u1ed7i kh\u00f4ng \u0111\u0103ng nh\u1eadp \u0111\u01b0\u1ee3c WordPress c\u00f3 th\u1ec3 g\u00e2y gi\u00e1n \u0111o\u1ea1n nghi\u00eam tr\u1ecdng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng website, \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1edbi c\u00e1c website kinh doanh. Tuy nhi\u00ean, ch\u1ec9 c\u1ea7n \u00e1p d\u1ee5ng \u0111\u00fang c\u00e1c ph\u01b0\u01a1ng ph\u00e1p tr\u00ean, b\u1ea1n ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c nhanh ch\u00f3ng v\u00e0 tr\u00e1nh t\u00e1i di\u1ec5n l\u1ed7i n\u00e0y. Ch\u00fac b\u1ea1n th\u00e0nh c\u00f4ng!<\/p>\n\n\n\n<h2 id=\"Nh\u1eefng_c\u00e2u_h\u1ecfi_th\u01b0\u1eddng_g\u1eb7p\"><a id=\"post-118318-_s6cm7jarha0p\"><\/a>Nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\t\t<section\t\thelp class=\"sc_fs_faq sc_card    \"\n\t\t\t\t>\n\t\t\t\t<h2 id=\"T\u00f4i_\u0111\u00e3_th\u1eed_m\u1ecdi_c\u00e1ch_nh\u01b0ng_v\u1eabn_kh\u00f4ng_th\u1ec3_\u0111\u0103ng_nh\u1eadp_th\u00ec_ph\u1ea3i_l\u00e0m_sao?\">T\u00f4i \u0111\u00e3 th\u1eed m\u1ecdi c\u00e1ch nh\u01b0ng v\u1eabn kh\u00f4ng th\u1ec3 \u0111\u0103ng nh\u1eadp th\u00ec ph\u1ea3i l\u00e0m sao?<\/h2>\t\t\t\t<div>\n\t\t\t\t\t\t<div class=\"sc_fs_faq__content\">\n\t\t\t\t\n\n<p>N\u1ebfu \u0111\u00e3 th\u1eed t\u1ea5t c\u1ea3 c\u00e1c gi\u1ea3i ph\u00e1p tr\u00ean m\u00e0 v\u1eabn kh\u00f4ng th\u00e0nh c\u00f4ng, b\u1ea1n c\u00f3 th\u1ec3 li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p hosting ho\u1eb7c thu\u00ea m\u1ed9t chuy\u00ean gia WordPress \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 kh\u1eafc ph\u1ee5c v\u1ea5n \u0111\u1ec1.<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section\t\thelp class=\"sc_fs_faq sc_card    \"\n\t\t\t\t>\n\t\t\t\t<h2 id=\"T\u1ea1i_sao_t\u00f4i_b\u1ecb_kh\u00f3a_\u0111\u0103ng_nh\u1eadp_sau_v\u00e0i_l\u1ea7n_th\u1eed_sai_m\u1eadt_kh\u1ea9u?\">T\u1ea1i sao t\u00f4i b\u1ecb kh\u00f3a \u0111\u0103ng nh\u1eadp sau v\u00e0i l\u1ea7n th\u1eed sai m\u1eadt kh\u1ea9u?<\/h2>\t\t\t\t<div>\n\t\t\t\t\t\t<div class=\"sc_fs_faq__content\">\n\t\t\t\t\n\n<p>C\u00f3 th\u1ec3 c\u00e1c plugin b\u1ea3o m\u1eadt (nh\u01b0 Wordfence ho\u1eb7c iThemes Security) \u0111\u00e3 k\u00edch ho\u1ea1t ch\u1ebf \u0111\u1ed9 kh\u00f3a. L\u00fac n\u00e0y, b\u1ea1n c\u1ea7n ch\u1edd th\u1eddi gian kh\u00f3a h\u1ebft hi\u1ec7u l\u1ef1c (th\u01b0\u1eddng 5-30 ph\u00fat) ho\u1eb7c v\u00f4 hi\u1ec7u h\u00f3a plugin qua FTP b\u1eb1ng c\u00e1ch \u0111\u1ed5i t\u00ean th\u01b0 m\u1ee5c plugin trong wp-content\/plugins.<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section\t\thelp class=\"sc_fs_faq sc_card    \"\n\t\t\t\t>\n\t\t\t\t<h2 id=\"Tr\u01b0\u1eddng_h\u1ee3p_t\u00f4i_\u0111\u00e3_nh\u1eadp_\u0111\u00fang_th\u00f4ng_tin_nh\u01b0ng_v\u1eabn_b\u1ecb_\u0111\u01b0a_v\u1ec1_trang_\u0111\u0103ng_nh\u1eadp,_t\u1ea1i_sao?\">Tr\u01b0\u1eddng h\u1ee3p t\u00f4i \u0111\u00e3 nh\u1eadp \u0111\u00fang th\u00f4ng tin nh\u01b0ng v\u1eabn b\u1ecb \u0111\u01b0a v\u1ec1 trang \u0111\u0103ng nh\u1eadp, t\u1ea1i sao?<\/h2>\t\t\t\t<div>\n\t\t\t\t\t\t<div class=\"sc_fs_faq__content\">\n\t\t\t\t\n\n<p><strong>L\u00fd do:<\/strong> Plugin ho\u1eb7c theme can thi\u1ec7p v\u00e0o qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c ho\u1eb7c b\u1ed9 nh\u1edb cache g\u00e2y l\u1ed7i.<\/p>\n\n\n\n<p><strong>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/strong> X\u00f3a cache (tr\u00ecnh duy\u1ec7t, plugin cache nh\u01b0 WP Rocket), sau \u0111\u00f3 v\u00f4 hi\u1ec7u h\u00f3a t\u1eebng plugin \u0111\u1ec3 ki\u1ec3m tra.<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section\t\thelp class=\"sc_fs_faq sc_card    \"\n\t\t\t\t>\n\t\t\t\t<h2 id=\"L\u1ed7i_n\u00e0y_c\u00f3_\u1ea3nh_h\u01b0\u1edfng_SEO_kh\u00f4ng?\">L\u1ed7i n\u00e0y c\u00f3 \u1ea3nh h\u01b0\u1edfng SEO kh\u00f4ng?<\/h2>\t\t\t\t<div>\n\t\t\t\t\t\t<div class=\"sc_fs_faq__content\">\n\t\t\t\t\n\n<p>L\u1ed7i &#8220;kh\u00f4ng \u0111\u0103ng nh\u1eadp \u0111\u01b0\u1ee3c WordPress&#8221; kh\u00f4ng \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn SEO, nh\u01b0ng c\u00f3 th\u1ec3 g\u00e2y ra nh\u1eefng t\u00e1c \u0111\u1ed9ng gi\u00e1n ti\u1ebfp nghi\u00eam tr\u1ecdng n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft k\u1ecbp th\u1eddi. Nh\u1eefng v\u1ea5n \u0111\u1ec1 nh\u01b0 downtime, l\u1ed7i c\u1ea5u tr\u00fac URL ho\u1eb7c t\u1ed1c \u0111\u1ed9 t\u1ea3i trang ch\u1eadm \u0111\u1ec1u c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m th\u1ee9 h\u1ea1ng trang web tr\u00ean c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm.<\/p>\n\n\n\n<p>V\u00ec v\u1eady, vi\u1ec7c x\u1eed l\u00fd nhanh ch\u00f3ng v\u00e0 hi\u1ec7u qu\u1ea3 c\u00e1c l\u1ed7i \u0111\u0103ng nh\u1eadp l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 duy tr\u00ec hi\u1ec7u su\u1ea5t SEO.<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\n<script type=\"application\/ld+json\">\n\t{\n\t\t\"@context\": \"https:\/\/schema.org\",\n\t\t\"@type\": \"FAQPage\",\n\t\t\"mainEntity\": [\n\t\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"T\u00f4i \u0111\u00e3 th\u1eed m\u1ecdi c\u00e1ch nh\u01b0ng v\u1eabn kh\u00f4ng th\u1ec3 \u0111\u0103ng nh\u1eadp th\u00ec ph\u1ea3i l\u00e0m sao?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"<p>N\u1ebfu \u0111\u00e3 th\u1eed t\u1ea5t c\u1ea3 c\u00e1c gi\u1ea3i ph\u00e1p tr\u00ean m\u00e0 v\u1eabn kh\u00f4ng th\u00e0nh c\u00f4ng, b\u1ea1n c\u00f3 th\u1ec3 li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p hosting ho\u1eb7c thu\u00ea m\u1ed9t chuy\u00ean gia WordPress \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 kh\u1eafc ph\u1ee5c v\u1ea5n \u0111\u1ec1.<\/p>\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"T\u1ea1i sao t\u00f4i b\u1ecb kh\u00f3a \u0111\u0103ng nh\u1eadp sau v\u00e0i l\u1ea7n th\u1eed sai m\u1eadt kh\u1ea9u?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"<p>C\u00f3 th\u1ec3 c\u00e1c plugin b\u1ea3o m\u1eadt (nh\u01b0 Wordfence ho\u1eb7c iThemes Security) \u0111\u00e3 k\u00edch ho\u1ea1t ch\u1ebf \u0111\u1ed9 kh\u00f3a. 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