php过滤字符串函数

分享一个php过滤字符串函数，具体代码如下：

代码如下:

function StripHTML($string){

$pattern=array ("'<script[^>]*?>.*?</script>'si", "'<style[^>]*?>.*?</style>'si", "'<[///!]*?[^<>]*?>'si", "'([/r/n])[/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 ($pattern, $replace, $str);

}