请问帝国cms自定义NOHTML函数标签过滤html代码用法

函数代码:

function NoHTML($string) {     $string = preg_replace("'&lt;script[^&gt;]*?&gt;.*?&lt;/script&gt;'si", "", $string);     $string = preg_replace("'&lt;[\/\!]*?[^&lt;&gt;]*?&gt;'si", "", $string);     $string = preg_replace("'([\r\n])[\s]+'", "", $string);     $string = mb_ereg_replace('^(　| )+', '', $string);     $string = mb_ereg_replace('(　| )+$', '', $string);     $string = preg_replace("'&(quot|#34);'i", "", $string);     $string = preg_replace("'&(amp|#38);'i", "", $string);     $string = preg_replace("'&(lt|#60);'i", "", $string);     $string = preg_replace("'&(gt|#62);'i", "", $string);     $string = preg_replace("'&(nbsp|#160);'i", "", $string);     return $string; }