Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial

The preg_match_all function is used to obtain specified data content. It is often used to perform regular expressions. Below I will introduce to you two tutorials on the implementation of the preg_match_all function. One is to obtain the url parameters, and the other is to obtain the image method in the content. ​

preg_match_all — Perform a global regular expression match

int preg_match_all ( string $pattern , string $subject [, array &$matches [, int $flags = PREG_PATTERN_ORDER [, int $offset = 0 ]]] )

Example

The code is as follows

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代码如下	复制代码
preg_match_all("|]+>(.*)]+>|U",     "example: this is a test ",     $out, PREG_PATTERN_ORDER); echo $out[0][0] . ", " . $out[0][1] . "n"; echo $out[1][0] . ", " . $out[1][1] . "n"; ?>

preg_match_all("|]+>(.*)]+>|U",
"example:

this is a test ",
$out, PREG_PATTERN_ORDER);
echo $out[0][0] . ", " . $out[0][1] . "n";
echo $out[1][0] . ", " . $out[1][1] . "n";
?>

How to get the corresponding value of the parameter variable in the pseudo-static URL.

For example. Your current url is like this. /js/d1b3cid419Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial99191rsGood script

Your .htaccess file will write rewirte rules like this RewriteRule ^js/(.*)$ /index.php?m=Sell&a=index&g=$1 [QSA,PT,L]

代码如下

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$get = 'd1b3cid419Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial99191rs好脚本'; $rs_pos = strpos($get,'rs'); if($rs_pos !== false) {     $rs = substr($get,$rs_pos);     $rs = str_replace('rs','',$rs);     $rs = strpos($rs,'/')!==false ? substr($rs,0,strpos($rs,'/')) : $rs;     $get = substr($get,0,$rs_pos); } echo 'keywords='.$rs; echo ' '; preg_match_all('/([a-z]*)([0-9]+)/',$get,$m); if($m) {         $k = $v = '';         $count = count($m[1]);         for($i = 0; $i         {             ${$m[1][$i]} = $m[Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial][$i];             if(isset(${$m[1][$i]}))             {                    echo $m[1][$i].'='.${$m[1][$i]};                 echo ' ';             }         } }

This way you can receive g.

The code is as follows

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$get = 'd1b3cid419Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial99191rsgood script'; $rs_pos = strpos($get,'rs'); if($rs_pos !== false) { $rs = substr($get,$rs_pos); $rs = str_replace('rs','',$rs); $rs = strpos($rs,'/')!==false ? substr($rs,0,strpos($rs,'/')) : $rs; $get = substr($get,0,$rs_pos); } echo 'keywords='.$rs; echo ' '; preg_match_all('/([a-z]*)([0-9]+)/',$get,$m); if($m) {           $k = $v = '';          $count = count($m[1]); for($i = 0; $i                                   {                ${$m[1][$i]} = $m[Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial][$i];                 if(isset(${$m[1][$i]}))                                                                     echo $m[1][$i].'='.${$m[1][$i]}; echo ' ';              }          } }

Result:keywords=good script,d=1,b=3,cid=419Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial99191

Match images in articles

The code is as follows

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代码如下

复制代码

$con = file_get_contents("http://www.bkjia.com/"); $pattern="//"; preg_match_all($pattern,$con,$match); print_r($match); ?> 输出代码 Array ( [0] => Array ( [0] => [1] => [Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial] => ) [1] => Array ( [0] => http://www.bkjia.com/uploadfile/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial013/0905/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial0130905074915895.png [1] => http://www.bkjia.com/uploadfile/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial013/0905/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial0130905074915639.jpg [Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial] => http://www.bkjia.com/uploadfile/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial013/0905/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial013090507491574Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial.jpg ) )

$con = file_get_contents("http://www.bkjia.com/");
$pattern="//";
preg_match_all($pattern,$con,$match);
print_r($match);
?>
Output code

Array
(
[0] => Array
(
[0] =>
[1] =>
[Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial] => ; margin-right: auto;" />
)
[1] => Array
(
[0] => http://www.bkjia.com/uploadfile/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial013/0905/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial0130905074915895.png
[1] => http://www.bkjia.com/uploadfile/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial013/0905/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial0130905074915639.jpg
[Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial] => http://www.bkjia.com/uploadfile/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial013/0905/Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial013090507491574Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial.jpg
)
)

http://www.bkjia.com/PHPjc/445630.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/445630.htmlTechArticle

preg_match_all function is used to obtain the specified data content. It is often used to execute regular expressions. Let me give Let’s introduce two tutorials on the implementation of preg_match_all function. One is to get...