{"id":12400,"date":"2015-01-22T09:04:00","date_gmt":"2015-01-22T09:04:00","guid":{"rendered":"https:\/\/kiencang.net\/2015\/01\/22\/mang-trong-php\/"},"modified":"2015-01-22T09:04:00","modified_gmt":"2015-01-22T09:04:00","slug":"mang-trong-php","status":"publish","type":"post","link":"https:\/\/kiencang.net\/mang-trong-php\/","title":{"rendered":"M\u1ea3ng trong PHP"},"content":{"rendered":"\n<p>N\u00f3i chung m\u00f4 t\u1ea3 v\u1ec1 m\u1ea3ng kh\u00e1 kh\u00f3 hi\u1ec3u, nh\u00ecn qua v\u00ed d\u1ee5 v\u1ec1 m\u1ea3ng th\u00ec \u0111\u01a1n gi\u1ea3n h\u01a1n, \u0111\u1ea1i kh\u00e1i m\u1ea3ng trong PHP c\u00f3 kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef nhi\u1ec1u d\u1eef li\u1ec7u trong ch\u1ec9 m\u1ed9t bi\u1ebfn.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$sach = array(\"L\u1eadp tr\u00ecnh web v\u1edbi PHP\", \"HTML \u2013 CSS\", \"Javascript c\u01a1 b\u1ea3n\");\necho \"\u0110\u1ec3 c\u00f3 kh\u1ea3 n\u0103ng t\u1ef1 code \u0111\u01b0\u1ee3c trang web t\u1ed1t b\u1ea1n c\u1ea7n \u0111\u1ecdc h\u1ebft 3 cu\u1ed1n s\u00e1ch sau c\u1ee7a nh\u00e0 tr\u01b0\u1eddng: \" . $sach&#91;0] . \", \" . $sach&#91;1] . \" v\u00e0 \" . $sach&#91;2] . \".\";\n?><\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_60 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\" role=\"button\"><label for=\"item-6577d69426f61\" ><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input aria-label=\"Toggle\" aria-label=\"item-6577d69426f61\"  type=\"checkbox\" id=\"item-6577d69426f61\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/kiencang.net\/mang-trong-php\/#Vay_thi_mang_la_gi\" title=\"V\u1eady th\u00ec m\u1ea3ng l\u00e0 g\u00ec?\">V\u1eady th\u00ec m\u1ea3ng l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/kiencang.net\/mang-trong-php\/#Cach_tao_mang_trong_PHP\" title=\"C\u00e1ch t\u1ea1o m\u1ea3ng trong PHP\">C\u00e1ch t\u1ea1o m\u1ea3ng trong PHP<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/kiencang.net\/mang-trong-php\/#Cach_them_du_lieu_vao_trong_mang\" title=\"C\u00e1ch th\u00eam d\u1eef li\u1ec7u v\u00e0o trong m\u1ea3ng\">C\u00e1ch th\u00eam d\u1eef li\u1ec7u v\u00e0o trong m\u1ea3ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/kiencang.net\/mang-trong-php\/#Do_dai_cua_mang\" title=\"\u0110\u1ed9 d\u00e0i c\u1ee7a m\u1ea3ng\">\u0110\u1ed9 d\u00e0i c\u1ee7a m\u1ea3ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/kiencang.net\/mang-trong-php\/#Dung_vong_lap_de_duyet_qua_cac_phan_tu_trong_mang\" title=\"D\u00f9ng v\u00f2ng l\u1eb7p \u0111\u1ec3 duy\u1ec7t qua c\u00e1c ph\u1ea7n t\u1eed trong m\u1ea3ng\">D\u00f9ng v\u00f2ng l\u1eb7p \u0111\u1ec3 duy\u1ec7t qua c\u00e1c ph\u1ea7n t\u1eed trong m\u1ea3ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/kiencang.net\/mang-trong-php\/#Mang_lien_ket_trong_PHP\" title=\"M\u1ea3ng li\u00ean k\u1ebft trong PHP\">M\u1ea3ng li\u00ean k\u1ebft trong PHP<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/kiencang.net\/mang-trong-php\/#Su_dung_vong_lap_foreach_trong_mang_lien_ket\" title=\"S\u1eed d\u1ee5ng v\u00f2ng l\u1eb7p foreach trong m\u1ea3ng li\u00ean k\u1ebft\">S\u1eed d\u1ee5ng v\u00f2ng l\u1eb7p foreach trong m\u1ea3ng li\u00ean k\u1ebft<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Vay_thi_mang_la_gi\"><\/span>V\u1eady th\u00ec m\u1ea3ng l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>M\u1ea3ng l\u00e0 bi\u1ebfn \u0111\u1eb7c bi\u1ec7t c\u00f3 kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef nhi\u1ec1u gi\u00e1 tr\u1ecb t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m.Gi\u1ea3 d\u1ee5 b\u1ea1n c\u00f3 danh s\u00e1ch c\u00e1c h\u1ecdc sinh trong l\u1edbp, d\u00f9ng m\u1ea3ng \u0111\u1ec3 l\u01b0u l\u00e0 \u00fd t\u01b0\u1edfng hay thay v\u00ec ph\u1ea3i s\u1eed d\u1ee5ng kho\u1ea3ng 30 \u0111\u1ebfn 40 bi\u1ebfn, b\u1ea1n ch\u1ec9 c\u1ea7n s\u1eed d\u1ee5ng m\u1ed9t m\u1ea3ng chung c\u00f3 t\u00ean $lop_hoc (b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1eb7t t\u00ean kh\u00e1c n\u1ebfu mu\u1ed1n).<\/p>\n\n\n\n<p>B\u1ea1n l\u1ea5y gi\u00e1 tr\u1ecb trong m\u1ea3ng th\u1ebf n\u00e0o? N\u1ebfu \u0111\u1ec3 \u00fd v\u00ed d\u1ee5 tr\u00ean b\u1ea1n c\u00f3 th\u1ec3 nh\u1eadn ra, m\u1ea3ng \u0111\u01b0\u1ee3c truy xu\u1ea5t th\u00f4ng qua s\u1ed1 ch\u1ec9 m\u1ee5c c\u1ee7a ph\u1ea7n t\u1eed, l\u01b0u \u00fd ch\u1ec9 m\u1ee5c \u0111\u1ea7u ti\u00ean b\u1eaft \u0111\u1ea7u t\u1eeb 0, ngh\u0129a l\u00e0 ph\u1ea7n t\u1eed \u0111\u1ea7u ti\u00ean c\u1ee7a m\u1ea3ng $a s\u1ebd l\u00e0 $a[0];<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cach_tao_mang_trong_PHP\"><\/span>C\u00e1ch t\u1ea1o m\u1ea3ng trong PHP<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Trong PHP, h\u00e0m array() d\u00f9ng \u0111\u1ec3 t\u1ea1o m\u1ea3ng, c\u00f3 3 ki\u1ec3u m\u1ea3ng:<\/p>\n\n\n\n<ul><li>M\u1ea3ng ch\u1ec9 m\u1ee5c: m\u1ea3ng v\u1edbi ch\u1ec9 m\u1ee5c l\u00e0 s\u1ed1<\/li><li>M\u1ea3ng li\u00ean k\u1ebft (c\u00f2n c\u00f3 t\u00ean m\u1ea3ng k\u1ebft h\u1ee3p): m\u1ea3ng v\u1edbi kh\u00f3a l\u00e0 k\u00fd t\u1ef1<\/li><li>M\u1ea3ng nhi\u1ec1u chi\u1ec1u: m\u1ea3ng m\u00e0 b\u00ean trong n\u00f3 c\u00f3 m\u1ed9t ho\u1eb7c nhi\u1ec1u m\u1ea3ng kh\u00e1c<\/li><\/ul>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cach_them_du_lieu_vao_trong_mang\"><\/span>C\u00e1ch th\u00eam d\u1eef li\u1ec7u v\u00e0o trong m\u1ea3ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ph\u1ea7n n\u00e0y r\u1ea5t quan tr\u1ecdng nh\u00e9, v\u00ec c\u00f3 m\u1ea3ng r\u1ed3i th\u00ec ph\u1ea3i bi\u1ebft c\u00e1ch th\u00eam gi\u00e1 tr\u1ecb v\u00e0o t\u1eebng ph\u1ea7n t\u1eed trong m\u1ea3ng.<\/p>\n\n\n\n<p>C\u00e1ch th\u1ee9 nh\u1ea5t:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$sach = array(\"L\u1eadp tr\u00ecnh web v\u1edbi PHP\", \"HTML v\u00e0 CSS\", \"Javascript c\u01a1 b\u1ea3n\");<\/code><\/pre>\n\n\n\n<p>L\u00fac n\u00e0y m\u1ea3ng s\u1ebd c\u00f3 3 ph\u1ea7n t\u1eed theo th\u1ee9 t\u1ef1 v\u00e0 \u0111\u01b0\u1ee3c ch\u1ec9 m\u1ee5c \u0111\u01b0\u1ee3c b\u1eaft \u0111\u1ea7u t\u1ef1 \u0111\u1ed9ng t\u1eeb 0, r\u1ed3i sau \u0111\u00f3 l\u00e0 1 v\u00e0 2.<\/p>\n\n\n\n<p>C\u00e1ch th\u1ee9 hai:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$sach&#91;0] = \"L\u1eadp tr\u00ecnh web v\u1edbi PHP\";\n$sach&#91;1] = \"HTML \u2013 CSS\";\n$sach&#91;2] = \"Javascript c\u01a1 b\u1ea3n\";<\/code><\/pre>\n\n\n\n<p>C\u00e1ch n\u00e0y ch\u1ec9 \u0111\u1ecbnh ph\u1ea7n t\u1eed c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c g\u00e1n gi\u00e1 tr\u1ecb n\u00e0o.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Do_dai_cua_mang\"><\/span>\u0110\u1ed9 d\u00e0i c\u1ee7a m\u1ea3ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Nhi\u1ec1u khi b\u1ea1n mu\u1ed1n bi\u1ebft m\u1ea3ng c\u00f3 bao nhi\u00eau ph\u1ea7n t\u1eed, ch\u1eb3ng h\u1ea1n m\u1ea3ng l\u1edbp h\u1ecdc th\u00ec c\u00f3 bao nhi\u00eau h\u1ecdc sinh trong \u0111\u00f3. Nhi\u1ec1u khi t\u00ecm \u0111\u1ed9 d\u00e0i c\u1ee7a m\u1ea3ng kh\u00f4ng ph\u1ea3i d\u00f9ng cho b\u1ea3n th\u00e2n n\u00f3 m\u00e0 th\u00f4ng tin n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c d\u00f9ng trong c\u00e1c v\u00f2ng l\u1eb7p \u0111\u1ec3 duy\u1ec7t qu\u1ea3 c\u00e1c ph\u1ea7n t\u1eed m\u00e0 t\u1eb9o n\u1eefa b\u1ea1n s\u1ebd th\u1ea5y ngay trong ph\u1ea7n k\u1ebf ti\u1ebfp.PHP d\u00f9ng h\u00e0m count() \u0111\u1ec3 \u0111\u1ebfm ph\u1ea7n t\u1eed c\u1ee7a m\u1ea3ng, v\u00ed d\u1ee5:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$sach = array(\"L\u1eadp tr\u00ecnh web v\u1edbi PHP\", \"HTML v\u00e0 CSS\", \"Javascript c\u01a1 b\u1ea3n\");echo count($sach);<\/code><\/pre>\n\n\n\n<p>K\u1ebft qu\u1ea3 s\u1ebd l\u00e0 3.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dung_vong_lap_de_duyet_qua_cac_phan_tu_trong_mang\"><\/span>D\u00f9ng v\u00f2ng l\u1eb7p \u0111\u1ec3 duy\u1ec7t qua c\u00e1c ph\u1ea7n t\u1eed trong m\u1ea3ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>L\u00e0m sao \u0111\u1ec3 b\u1ea1n l\u00f4i ra t\u1eebng ph\u1ea9n t\u1eed trong m\u1ea3ng r\u1ed3i xu\u1ea5t ra m\u00e0n h\u00ecnh. Trong v\u00ed d\u1ee5 n\u00e0y, ch\u00fang t\u00f4i k\u1ebft h\u1ee3p s\u1eed d\u1ee5ng \u0111\u1ed9 d\u00e0i m\u1ea3ng, v\u00f2ng l\u1eb7p for, v\u00ed d\u1ee5:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$sach = array(\"L\u1eadp tr\u00ecnh web v\u1edbi PHP\", \"HTML v\u00e0 CSS\", \"Javascript c\u01a1 b\u1ea3n\");$l = count($sach);for ($i = 0; $i &lt; $l; $i++) { echo $sach&#91;$i]; echo \"&lt;br>\";}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mang_lien_ket_trong_PHP\"><\/span>M\u1ea3ng li\u00ean k\u1ebft trong PHP<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>M\u1ea3ng li\u00ean k\u1ebft d\u00f9ng t\u1eeb kh\u00f3a \u0111\u1ec3 k\u1ebft n\u1ed1i gi\u00e1 tr\u1ecb v\u1edbi ph\u1ea7n t\u1eed c\u1ee7a m\u1ea3ng. C\u00f3 hai c\u00e1ch \u0111\u1ec3 t\u1ea1o m\u1ea3ng li\u00ean k\u1ebft. C\u00e1ch th\u1ee9 nh\u1ea5t:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$gio_hang = array(\"Qu\u1ea7n\"=>\"3\", \"\u00c1o\"=>\"2\", \"B\u00fat bi\"=>\"5\");<\/code><\/pre>\n\n\n\n<p>C\u00e1ch th\u1ee9 hai:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$gio_hang&#91;Qu\u1ea7n] = 3; $gio_hang&#91;\u00c1o] = 2; $gio_hang&#91;B\u00fat bi] = 5;<\/code><\/pre>\n\n\n\n<p>T\u1eeb kh\u00f3a trong m\u1ea3ng li\u00ean k\u1ebft c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nh\u01b0 trong \u0111o\u1ea1n m\u00e3 sau:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$gio_hang = array(\"Qu\u1ea7n\"=>\"3\", \"\u00c1o\"=>\"2\", \"B\u00fat bi\"=>\"5\");echo $gio_hang&#91;'\u00c1o'];<\/code><\/pre>\n\n\n\n<p>K\u1ebft qu\u1ea3 s\u1ebd l\u00e0 2.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Su_dung_vong_lap_foreach_trong_mang_lien_ket\"><\/span>S\u1eed d\u1ee5ng v\u00f2ng l\u1eb7p foreach trong m\u1ea3ng li\u00ean k\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 \u0111o\u1ea1n code m\u1eabu, ch\u00fa \u00fd h\u00e0m\u00a0<strong>foreach<\/strong>, t\u1eeb kh\u00f3a\u00a0<strong>as<\/strong>\u00a0v\u00e0 d\u1ea5u\u00a0<strong>=><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$gio_hang = array(\"Qu\u1ea7n\"=>\"3\", \"\u00c1o\"=>\"2\", \"B\u00fat bi\"=>\"5\");foreach($gio_hang as $x => $x_value) {echo \"Key=\" . $x . \", Value=\" . $x_value; echo \"&lt;br>\";}<\/code><\/pre>\n\n\n\n<p>\u0110\u00e2y l\u00e0 k\u1ebft qu\u1ea3:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Key=Qu\u1ea7n, Value=3\nKey=\u00c1o, Value=2\nKey=B\u00fat bi, Value=5<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>N\u00f3i chung m\u00f4 t\u1ea3 v\u1ec1 m\u1ea3ng kh\u00e1 kh\u00f3 hi\u1ec3u, nh\u00ecn qua v\u00ed d\u1ee5 v\u1ec1 m\u1ea3ng th\u00ec \u0111\u01a1n gi\u1ea3n h\u01a1n, \u0111\u1ea1i kh\u00e1i m\u1ea3ng trong PHP c\u00f3 kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef nhi\u1ec1u d\u1eef li\u1ec7u trong ch\u1ec9 m\u1ed9t bi\u1ebfn. V\u00ed d\u1ee5: V\u1eady th\u00ec m\u1ea3ng l\u00e0 g\u00ec? M\u1ea3ng l\u00e0 bi\u1ebfn \u0111\u1eb7c bi\u1ec7t c\u00f3 kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef nhi\u1ec1u gi\u00e1 &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[238],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>M\u1ea3ng trong PHP &#8226; Ki\u1ebfn c\u00e0ng<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kiencang.net\/mang-trong-php\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"M\u1ea3ng trong PHP &#8226; Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"og:description\" content=\"N\u00f3i chung m\u00f4 t\u1ea3 v\u1ec1 m\u1ea3ng kh\u00e1 kh\u00f3 hi\u1ec3u, nh\u00ecn qua v\u00ed d\u1ee5 v\u1ec1 m\u1ea3ng th\u00ec \u0111\u01a1n gi\u1ea3n h\u01a1n, \u0111\u1ea1i kh\u00e1i m\u1ea3ng trong PHP c\u00f3 kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef nhi\u1ec1u d\u1eef li\u1ec7u trong ch\u1ec9 m\u1ed9t bi\u1ebfn. V\u00ed d\u1ee5: V\u1eady th\u00ec m\u1ea3ng l\u00e0 g\u00ec? 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