php下清空字符串中的HTML标签的代码_php技巧

function clear_html_label($html)
{
$search = array ("'<script>]*?>.*?</script>'si", "']*?>'si", "'([rn])[s]+'", "'&(quot|#34);'i", "'&(amp|#38);'i", "'&(lt|#60);'i", "'&(gt|#62);'i", "'&(nbsp|#160);'i", "'&(iexcl|#161);'i", "'&(cent|#162);'i", "'&(pound|#163);'i", "'&(copy|#169);'i", "'(d+);'e");
$replace = array ("", "", "1", """, "&", "", " ", chr(161), chr(162), chr(163), chr(169), "chr(1)");

return preg_replace($search, $replace, $html);
}

//实例应用

$string ='aaa
<script>fdsafsa'; <BR>echo clear_html_label($string);//aaa fdsafsa <br><br>//利用php自带函数strip_tags(); www.zzarea.com <BR>echo strip_tags($string);//aaa fdsafsa <BR></script>