Detailed explanation of regular matching of preg_match_all function in PHP

Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial

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Release： 2016-07-20 10:59:11

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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

复制代码

$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

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$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] => 875EA1C00E50B454Detailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial797EDetailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial4FA6E7E1FDetailed explanation of regular matching of preg_match_all function in PHP_PHP tutorial.jpg
)
[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

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...