This article mainly introduces the relevant information about PHP regular expressions to obtain all links of the content. Friends in need can refer to it.
Method one:
function get_all_url($code){ preg_match_all('/<as+href=["|']?([^>"' ]+)["|']?s*[^>]*>([^>]+)</a>/i',$code,$arr); return array('name'=>$arr[2],'url'=>$arr[1]); }
Method two:
/** * date 2015-07-24 **/ $site=substr($url,0,strpos($url,"/",8));//站点 $base=substr($url,0,strrpos($url,"/")+1);//文件所在目录 $fp = fopen($url, "r" );//打开url while(!feof($fp))$contents.=fread($fp,1024);// $pattern="|href=['"]?([^ '"]+)['" ]|u"; preg_match_all($pattern,$contents, $regarr, preg_set_order);//匹配所有href= for($i=0;$i<count($regarr);$i++){//遍历所有匹配 if(!eregi("://",$regarr[$i][1]))//是否是相对路径,即是否还有:// if(substr($regarr[$i][1],0,1)=="/")//是否是站点的根目录 echo "link".($i+1).":".$site.$regarr[$i][1]."<br/>";//根目录 else echo "link".($i+1).":".$base.$regarr[$i][1]."<br/>";//当前目录 else echo "link".($i+1).":".$regarr[$i][1]."<br/>";//相对路径 } fclose($fp);
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