Summary of php regular expression methods to obtain image url

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);
?>

Attached, a summary of regular expressions for filtering html tags, attributes, etc. in PHP.

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