Link address program code in php matching characters_PHP tutorial

Determine whether a string contains a hyperlink

The code is as follows

代码如下
$str="ssdsfsdfsdfss"; if(preg_match("/]*>|]*>/i",$str)) { echo "该字符串有超链接"; } else { echo "该字符串没有超链接标记"; } ?>

$str="ssdsfsdfsdfss";

if(preg_match("/]*>|]*>/i",$str))
{

echo "This string has a hyperlink";

代码如下
echo preg_replace("/(?<=href=)([^>]*)(?=>)/i","#", "你好，点这里看看你好，点这里看看"); ?>

}

else

{

echo "The string has no hyperlink tag";
}
?>

Next we only need to filter the connection part.

The code is as follows
echo preg_replace("/(?<=href=)([^>]*)(?=>)/i","#", " Hello, click here to take a lookHello, click here to take a look"); ?>

Regular: /(?<=href=)([^>]*)(?=>)/

代码如下

function match_links($document) {        preg_match_all("']+))[^>]*>?(.*?)'isx",$document,$links);                            while(list($key,$val) = each($links[2])) {         if(!empty($val))             $match['link'][] = $val;     }     while(list($key,$val) = each($links[3])) {         if(!empty($val))             $match['link'][] = $val;     }            while(list($key,$val) = each($links[4])) {         if(!empty($val))             $match['content'][] = $val;     }     while(list($key,$val) = each($links[0])) {         if(!empty($val))             $match['all'][] = $val;     }                    return $match; }

(?<=exp) matches the position after exp

(?=exp) matches the position before exp

This regular match matches all characters that are not “>” after href= and before “>” Example: Find these characters (url) and replace them with # to remove all links in the html. Now share an example of extracting hyperlinks

The code is as follows

function match_links($document) { preg_match_all("']+))[^ >]*>?(.*?)'isx",$document,$links); while(list($key,$val) = each($links[2])) { if(!empty($val)) $match['link'][] = $val; } while(list($key,$val) = each($links[3])) { if(!empty($val)) $match['link'][] = $val; }  while(list($key,$val) = each($links[4])) { if(!empty($val)) $match['content'][] = $val; } while(list($key,$val) = each($links[0])) { if(!empty($val)) $match['all'][] = $val; }                                          return $match; }

http://www.bkjia.com/PHPjc/372042.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/372042.htmlTechArticleTo determine whether a string contains a hyperlink code is as follows $str=ssdsfa target='_blank' href='http: //www.45it.net/' sdf/asdfss; if(preg_match(/a/s+href=[^]*|//[^a]*a[^]*/i,$str)) {. ..

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