php 正则表达式获取图片url方法汇总

header("Content-type:text/html;charset=utf-8");
$str = '';
$pattern = "/[img|IMG].*?src=['|\"](.*?(?:[.gif|.jpg]))['|\"].*?[\/]?>/";
preg_match_all($pattern,$str,$match);
echo "";
print_r($match);
?>

附，php过滤html标签、属性等正则表达式汇总。

function DeleteHtml($str)
{
$str = trim($str);
$str = strip_tags($str,"");
$str = ereg_replace("\t","",$str);
$str = ereg_replace("\r\n","",$str);
$str = ereg_replace("\r","",$str);
$str = ereg_replace("\n","",$str);
$str = ereg_replace(" "," ",$str);
return trim($str);
}