php安全过滤函数

项目开发中需要的php安全过滤函数，希望对大家所有帮助，代码很简单。

function safe_replace($string) {

$string = str_replace('%20','',$string);

$string = str_replace('%27','',$string);

$string = str_replace('%2527','',$string);

$string = str_replace('*','',$string);

$string = str_replace('"','"',$string);

$string = str_replace("'",'',$string);

$string = str_replace('"','',$string);

$string = str_replace(';','',$string);

$string = str_replace('<','&lt;',$string);

$string = str_replace('>','&gt;',$string);

$string = str_replace("{",'',$string);

$string = str_replace('}','',$string);

$string = str_replace('','',$string);

return $string;

}