{"id":15641,"date":"2022-08-30T11:53:54","date_gmt":"2022-08-30T04:53:54","guid":{"rendered":"https:\/\/www.hostify.vn\/blog\/?p=15641"},"modified":"2022-08-30T11:53:54","modified_gmt":"2022-08-30T04:53:54","slug":"ngon-ngu-php-la-gi","status":"publish","type":"post","link":"https:\/\/www.hostify.vn\/blog\/ngon-ngu-php-la-gi\/","title":{"rendered":"Ng\u00f4n ng\u1eef PHP l\u00e0 g\u00ec? T\u1ed5ng h\u1ee3p ki\u1ebfn th\u1ee9c cho ng\u01b0\u1eddi m\u1edbi v\u1ec1 PHP"},"content":{"rendered":"

\"Ng\u00f4n<\/strong><\/p>\n

Ng\u00f4n ng\u1eef PHP l\u00e0 g\u00ec?<\/h2>\n

PHP (vi\u1ebft t\u1eaft c\u1ee7a Hypertext Preprocessor) l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh ph\u00eda m\u00e1y ch\u1ee7 ph\u1ed5 bi\u1ebfn nh\u1ea5t th\u1ebf gi\u1edbi, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ee7 y\u1ebfu \u0111\u1ec3 ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng web \u0111\u1ed9ng. Nhi\u1ec1u trang web n\u1ed5i ti\u1ebfng nh\u01b0 Facebook, WordPress v\u00e0 Wikipedia \u0111\u1ec1u s\u1eed d\u1ee5ng PHP. PHP c\u0169ng l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh d\u1ec5 h\u1ecdc v\u00e0 m\u1ea1nh m\u1ebd, c\u00f3 nhi\u1ec1u t\u00e0i li\u1ec7u v\u00e0 c\u1ed9ng \u0111\u1ed3ng ph\u00e1t tri\u1ec3n l\u1edbn. Vi\u1ec7c h\u1ecdc PHP gi\u00fap b\u1ea1n c\u00f3 c\u01a1 h\u1ed9i l\u00e0m vi\u1ec7c tr\u00ean n\u1ec1n t\u1ea3ng ph\u00e1t tri\u1ec3n web r\u1ed9ng l\u1edbn v\u00e0 c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c \u1ee9ng d\u1ee5ng web m\u1ea1nh m\u1ebd.<\/p>\n

\u01afu \u0111i\u1ec3m c\u1ee7a ng\u00f4n ng\u1eef PHP<\/h2>\n

D\u1ec5 h\u1ecdc v\u00e0 s\u1eed d\u1ee5ng<\/h3>\n

PHP c\u00f3 c\u00fa ph\u00e1p \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 hi\u1ec3u, gi\u00fap ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u d\u1ec5 d\u00e0ng ti\u1ebfp c\u1eadn v\u00e0 nhanh ch\u00f3ng ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng web \u0111\u01a1n gi\u1ea3n. PHP s\u1eed d\u1ee5ng c\u00fa ph\u00e1p t\u01b0\u01a1ng t\u1ef1 v\u1edbi C v\u00e0 Java, n\u00ean n\u1ebfu b\u1ea1n \u0111\u00e3 l\u00e0m quen v\u1edbi c\u00e1c ng\u00f4n ng\u1eef n\u00e0y, vi\u1ec7c h\u1ecdc PHP s\u1ebd tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n. C\u00e1c \u0111o\u1ea1n m\u00e3 PHP \u0111\u01b0\u1ee3c \u0111\u1eb7t trong c\u1eb7p th\u1ebb “” ho\u1eb7c “<? … ?>”.<\/p>\n

PHP c\u00f3 kh\u1ea3 n\u0103ng t\u00edch h\u1ee3p t\u1ed1t v\u1edbi HTML v\u00e0 CSS, cho ph\u00e9p b\u1ea1n t\u1ea1o ra c\u00e1c trang web \u0111\u1ed9ng v\u00e0 t\u01b0\u01a1ng t\u00e1c v\u1edbi ng\u01b0\u1eddi d\u00f9ng. B\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng nh\u00fang m\u00e3 PHP v\u00e0o trong m\u00e3 HTML \u0111\u1ec3 t\u1ea1o ra c\u00e1c trang web \u0111\u1ed9ng.<\/p>\n

Ngo\u00e0i ra, nh\u01b0 \u0111\u00e3 n\u00f3i \u1edf tr\u00ean, c\u00f3 nhi\u1ec1u t\u00e0i li\u1ec7u h\u1ecdc t\u1eadp PHP c\u0169ng nh\u01b0 c\u00e1c ngu\u1ed3n t\u01b0 v\u1ea5n tr\u1ef1c tuy\u1ebfn, gi\u00fap b\u1ea1n nhanh ch\u00f3ng gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n. PHP s\u1edf h\u1eefu m\u1ed9t c\u1ed9ng \u0111\u1ed3ng ph\u00e1t tri\u1ec3n \u0111a d\u1ea1ng v\u1edbi v\u00f4 v\u00e0n t\u00e0i li\u1ec7u, di\u1ec5n \u0111\u00e0n v\u00e0 trang web h\u1ecdc t\u1eadp. B\u1ea1n c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y nhi\u1ec1u t\u00e0i li\u1ec7u h\u1ecdc PHP tr\u00ean trang ch\u1ee7 c\u1ee7a PHP.net v\u00e0 c\u00e1c di\u1ec5n \u0111\u00e0n nh\u01b0 Stack Overflow.<\/p>\n

H\u1ed7 tr\u1ee3 t\u1ed1t cho c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/h3>\n

PHP c\u00f3 t\u00edch h\u1ee3p t\u1ed1t v\u1edbi nhi\u1ec1u h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u ph\u1ed5 bi\u1ebfn nh\u01b0 MySQL, PostgreSQL, SQLite, Oracle, v\u00e0 nhi\u1ec1u h\u01a1n n\u1eefa. B\u1ea1n c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i v\u00e0 thao t\u00e1c v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng c\u00e1c h\u00e0m PHP nh\u01b0 mysqli v\u00e0 PDO. Vi\u1ec7c h\u1ecdc PHP s\u1ebd gi\u00fap b\u1ea1n l\u00e0m vi\u1ec7c hi\u1ec7u qu\u1ea3 h\u01a1n v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c nh\u01b0 truy v\u1ea5n, th\u00eam, s\u1eeda \u0111\u1ed5i v\u00e0 x\u00f3a d\u1eef li\u1ec7u.<\/p>\n

PHP c\u00f2n \u0111\u1eb7c bi\u1ec7t ph\u00f9 h\u1ee3p \u0111\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u g\u1eedi t\u1eeb bi\u1ec3u m\u1eabu HTML. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c h\u00e0m PHP \u0111\u1ec3 l\u1ea5y d\u1eef li\u1ec7u t\u1eeb c\u00e1c tr\u01b0\u1eddng form v\u00e0 x\u1eed l\u00fd ch\u00fang, nh\u01b0 th\u00eam v\u00e0o c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u1eb7c g\u1eedi email.<\/p>\n

\"Ng\u00f4n<\/p>\n

Framework ph\u00e1t tri\u1ec3n m\u1ea1nh m\u1ebd<\/h3>\n

PHP c\u00f3 nhi\u1ec1u framework ph\u00e1t tri\u1ec3n web m\u1ea1nh m\u1ebd nh\u01b0 Laravel, Symfony, v\u00e0 CodeIgniter. S\u1eed d\u1ee5ng c\u00e1c framework n\u00e0y gi\u00fap b\u1ea1n nhanh ch\u00f3ng x\u00e2y d\u1ef1ng \u1ee9ng d\u1ee5ng web ph\u1ee9c t\u1ea1p, t\u0103ng t\u1ed1c \u0111\u1ed9 ph\u00e1t tri\u1ec3n v\u00e0 \u0111\u1ea3m b\u1ea3o m\u00e3 ngu\u1ed3n \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec.<\/p>\n

B\u00ean c\u1ea1nh \u0111\u00f3, PHP c\u00f3 th\u1ec3 ch\u1ea1y tr\u00ean h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 \u0111i\u1ec1u h\u00e0nh nh\u01b0 Windows, Linux, macOS v\u00e0 c\u1ea5u h\u00ecnh web server ph\u1ed5 bi\u1ebfn nh\u01b0 Apache, Nginx.<\/p>\n

PHP c\u00f2n c\u00f3 h\u1ec7 th\u1ed1ng m\u1edf r\u1ed9ng (extension) r\u1ea5t \u0111a d\u1ea1ng, cho ph\u00e9p b\u1ea1n m\u1edf r\u1ed9ng t\u00ednh n\u0103ng c\u1ee7a ng\u00f4n ng\u1eef v\u00e0 t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 kh\u00e1c nh\u01b0 cURL, JSON, XML, v\u00e0 nhi\u1ec1u h\u01a1n n\u1eefa.<\/p>\n

C\u01a1 h\u1ed9i ph\u00e1t tri\u1ec3n ngh\u1ec1 nghi\u1ec7p<\/h3>\n

V\u1edbi s\u1ef1 ph\u1ed5 bi\u1ebfn v\u00e0 s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i c\u1ee7a PHP, vi\u1ec7c h\u1ecdc PHP s\u1ebd m\u1edf ra nhi\u1ec1u c\u01a1 h\u1ed9i ngh\u1ec1 nghi\u1ec7p trong l\u0129nh v\u1ef1c ph\u00e1t tri\u1ec3n web. C\u00f3 nhi\u1ec1u c\u00f4ng vi\u1ec7c v\u00e0 d\u1ef1 \u00e1n li\u00ean quan \u0111\u1ebfn PHP, v\u00e0 vi\u1ec7c c\u00f3 ki\u1ebfn th\u1ee9c v\u1ec1 ng\u00f4n ng\u1eef n\u00e0y s\u1ebd l\u00e0 l\u1ee3i th\u1ebf l\u1edbn trong vi\u1ec7c t\u00ecm ki\u1ebfm vi\u1ec7c l\u00e0m.<\/p>\n

Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a ng\u00f4n ng\u1eef PHP<\/h2>\n

M\u1eb7c d\u00f9 PHP c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m, nh\u01b0ng c\u0169ng c\u00f3 m\u1ed9t s\u1ed1 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ea7n l\u01b0u \u00fd:<\/p>\n

Qu\u1ea3n l\u00fd ng\u00f4n ng\u1eef v\u00e0 m\u00e3 ngu\u1ed3n<\/h3>\n

PHP kh\u00f4ng c\u00f3 h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd ng\u00f4n ng\u1eef v\u00e0 t\u1ed5 ch\u1ee9c m\u00e3 ngu\u1ed3n ch\u1eb7t ch\u1ebd nh\u01b0 m\u1ed9t s\u1ed1 ng\u00f4n ng\u1eef kh\u00e1c nh\u01b0 Python ho\u1eb7c Java. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c vi\u1ebft m\u00e3 ngu\u1ed3n kh\u00f4ng c\u1ea5u tr\u00fac v\u00e0 kh\u00f3 b\u1ea3o tr\u00ec.<\/p>\n

B\u1ea3o m\u1eadt<\/h3>\n

M\u1eb7c d\u00f9 c\u00f3 c\u1ea3i thi\u1ec7n, PHP \u0111\u00e3 t\u1eebng \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 b\u1ea3o m\u1eadt. C\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt nh\u01b0 t\u1ea5n c\u00f4ng SQL Injection v\u00e0 Cross-Site Scripting (XSS) c\u00f3 th\u1ec3 x\u1ea3y ra n\u1ebfu kh\u00f4ng tu\u00e2n th\u1ee7 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt ph\u00f9 h\u1ee3p.<\/p>\n

Hi\u1ec7u su\u1ea5t<\/h3>\n

So v\u1edbi m\u1ed9t s\u1ed1 ng\u00f4n ng\u1eef kh\u00e1c nh\u01b0 Python ho\u1eb7c Node.js, PHP c\u00f3 th\u1ec3 ch\u1ea1y ch\u1eadm h\u01a1n trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p. Tuy nhi\u00ean, hi\u1ec7u su\u1ea5t c\u1ee7a PHP c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt t\u1ed1i \u01b0u m\u00e3 v\u00e0 c\u1ea5u h\u00ecnh m\u00f4i tr\u01b0\u1eddng.<\/p>\n

\"Ng\u00f4n<\/p>\n

C\u00fa ph\u00e1p h\u1ea1n ch\u1ebf<\/h3>\n

M\u1ed9t s\u1ed1 l\u1eadp tr\u00ecnh vi\u00ean cho r\u1eb1ng c\u00fa ph\u00e1p c\u1ee7a PHP kh\u00f4ng \u0111\u01b0\u1ee3c s\u00e1ng t\u1ea1o v\u00e0 h\u1ea1n ch\u1ebf so v\u1edbi m\u1ed9t s\u1ed1 ng\u00f4n ng\u1eef kh\u00e1c. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c tr\u1edf ng\u1ea1i trong vi\u1ec7c vi\u1ebft m\u00e3 ngu\u1ed3n \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 \u0111\u1ecdc.<\/p>\n

Th\u00f4ng tin l\u1ed7i<\/h3>\n

PHP th\u01b0\u1eddng hi\u1ec3n th\u1ecb th\u00f4ng tin l\u1ed7i chi ti\u1ebft v\u00e0 c\u1ea3nh b\u00e1o tr\u1ef1c ti\u1ebfp tr\u00ean trang web, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 ti\u1ec1m \u1ea9n r\u1ee7i ro b\u1ea3o m\u1eadt v\u00e0 l\u00e0m cho \u1ee9ng d\u1ee5ng tr\u1edf n\u00ean kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n

Tuy nhi\u00ean, nh\u1eefng nh\u01b0\u1ee3c \u0111i\u1ec3m tr\u00ean c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c v\u00e0 v\u01b0\u1ee3t qua b\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c quy \u01b0\u1edbc l\u1eadp tr\u00ecnh t\u1ed1t, \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt v\u00e0 t\u1ed1i \u01b0u h\u00f3a m\u00e3 ngu\u1ed3n. M\u1eb7c d\u00f9 PHP kh\u00f4ng ho\u00e0n h\u1ea3o, nh\u01b0ng n\u00f3 v\u1eabn l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef ph\u00e1t tri\u1ec3n web m\u1ea1nh m\u1ebd v\u00e0 ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i tr\u00ean to\u00e0n th\u1ebf gi\u1edbi.<\/p>\n

M\u1ed9t s\u1ed1 c\u00e2u l\u1ec7nh PHP c\u01a1 b\u1ea3n<\/h2>\n

D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u00e2u l\u1ec7nh PHP c\u01a1 b\u1ea3n \u0111\u1ec3 b\u1ea1n b\u1eaft \u0111\u1ea7u:<\/p>\n

In ra m\u00e0n h\u00ecnh<\/h3>\n

echo “Hello, world!”;<\/p>\n

\"Ng\u00f4n<\/p>\n

G\u00e1n gi\u00e1 tr\u1ecb cho bi\u1ebfn<\/h3>\n

$variableName = “value”;<\/p>\n

Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh<\/h3>\n

$result = $num1 + $num2;<\/p>\n

C\u1ea5u tr\u00fac \u0111i\u1ec1u ki\u1ec7n if-else<\/h3>\n

if ($condition) {<\/p>\n

\/\/ Code th\u1ef1c thi n\u1ebfu \u0111i\u1ec1u ki\u1ec7n \u0111\u00fang<\/p>\n

} else {<\/p>\n

\/\/ Code th\u1ef1c thi n\u1ebfu \u0111i\u1ec1u ki\u1ec7n sai<\/p>\n

}<\/p>\n

V\u00f2ng l\u1eb7p for<\/h3>\n

for ($i = 0; $i < 5; $i++) {<\/p>\n

\/\/ Code th\u1ef1c thi trong v\u00f2ng l\u1eb7p<\/p>\n

}<\/p>\n

V\u00f2ng l\u1eb7p while<\/h3>\n

while ($condition) {<\/p>\n

\/\/ Code th\u1ef1c thi trong v\u00f2ng l\u1eb7p<\/p>\n

\/\/ C\u1eadp nh\u1eadt \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 k\u1ebft th\u00fac v\u00f2ng l\u1eb7p<\/p>\n

}<\/p>\n

H\u00e0m<\/h3>\n

function functionName($param1, $param2) {<\/p>\n

\/\/ Code th\u1ef1c thi trong h\u00e0m<\/p>\n

return $result;<\/p>\n

}<\/p>\n

K\u1ebft n\u1ed1i v\u00e0 truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u MySQLi<\/h3>\n

$connection = mysqli_connect(“hostname”, “username”, “password”, “database”);<\/p>\n

$query = “SELECT * FROM table”;<\/p>\n

$result = mysqli_query($connection, $query);<\/p>\n

while ($row = mysqli_fetch_assoc($result)) {<\/p>\n

\/\/ Code th\u1ef1c thi v\u1edbi m\u1ed7i d\u00f2ng d\u1eef li\u1ec7u tr\u1ea3 v\u1ec1<\/p>\n

}<\/p>\n

mysqli_close($connection);<\/p>\n

\u0110\u00e2y ch\u1ec9 l\u00e0 m\u1ed9t s\u1ed1 c\u00e2u l\u1ec7nh PHP c\u01a1 b\u1ea3n \u0111\u1ec3 gi\u00fap b\u1ea1n b\u1eaft \u0111\u1ea7u. PHP c\u00f2n r\u1ea5t nhi\u1ec1u c\u00e2u l\u1ec7nh v\u00e0 t\u00ednh n\u0103ng ph\u1ee9c t\u1ea1p kh\u00e1c. H\u00e3y kh\u00e1m ph\u00e1 th\u00eam trong t\u00e0i li\u1ec7u PHP ch\u00ednh th\u1ee9c v\u00e0 c\u00e1c ngu\u1ed3n h\u1ecdc t\u1eadp kh\u00e1c \u0111\u1ec3 l\u00e0m quen v\u1edbi ng\u00f4n ng\u1eef n\u00e0y nh\u00e9!<\/p>\n

B\u00e0i vi\u1ebft li\u00ean quan:<\/strong><\/h4>\n