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PHP获取页面中所有链接的正则

WBOY
Release: 2016-06-20 13:03:49
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总结了一个PHP获取页面中的所有链接的函数,函数代码如下:

<p>/*</p>*PHP获取页面中的所有链接<br />*/<br />function getPageLink($url){<br />	set_time_limit(0);<br />	$html=file_get_contents($url);<br />	preg_match_all("/<a(s*[^>]+s*)href=([\"|']?)([^\"'>\s]+)([\"|']?)/ies",$html,$out);<br />	$arrLink=$out[3];<br />	$arrUrl=parse_url($url);<br />	$dir='';<br />	if(isset($arrUrl['path'])&&!empty($arrUrl['path'])){<br />		$dir=str_replace("\\","/",$dir=dirname($arrUrl['path']));<br />		if($dir=="/"){<br />			$dir="";<br />		}<br />	}<br />	if(is_array($arrLink)&&count($arrLink)>0){<br />		$arrLink=array_unique($arrLink);<br />		foreach($arrLink as $key=>$val){<br />			$val=strtolower($val);<br />			if(preg_match('/^#*$/isU',$val)){<br />				unset($arrLink[$key]);<br />			}elseif(preg_match('/^\//isU',$val)){<br />				$arrLink[$key]='http://'.$arrUrl['host'].$val;<br />			}elseif(preg_match('/^javascript/isU',$val)){<br />				unset($arrLink[$key]);<br />			}elseif(preg_match('/^mailto:/isU',$val)){<br />				unset($arrLink[$key]);<br />			}elseif(!preg_match('/^\//isU',$val)&&strpos($val,'http://')===FALSE){<br />				$arrLink[$key]='http://'.$arrUrl['host'].$dir.'/'.$val;<br />			}<br />		}<br />	}<br />	sort($arrLink);<br />	return $arrLink;<br />}
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函数用法如下:

<p>$links=getPageLink('http://www.scutephp.com');</p>echo "<pre class="brush:php;toolbar:false">";<br />print_r($links);
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