php下过滤HTML代码的函数_php技巧

/*----------------------
过滤HTML代码的函数
--------------- --------*/
函数 htmlEncode($string) {
    $string=trim($string);
    $string=str_replace("&","&",$string);
    $string=str_replace("'","'",$string);
    $string=str_replace("&","&",$string);
    $string=str_replace(""",""",$string);
    $string=str_replace(""",""",$string);
    $string=str_replace("    $string=str_replace("    $string=str_replace(">",">",$string);
    $string=str_replace(">",">",$string);
    $string=str_replace(" "," ",$string);
    $string=nl2br($string);
    返回 $string;
}