动态网页技术PHP程序字符串处理函数

动态网页技术PHP程序字符串处理函数(7)                         if ($str[$i] == $encrypt_key [$j]){
                                $enstr .=  $decrypt_key[$j];
                                break;
                        }
                }
        }
        return $enstr;
}

//简单解密函数（与php_encrypt函数对应）
function php_decrypt($str)
{
         $encrypt_key = 'abcdefghijklmnopqrstuvwxyz1234567890';
         $decrypt_key = 'ngzqtcobmuhelkpdawxfyivrsj2468021359';
        if ( strlen($str) == 0) return  false;
        for ($i=0;  $i<strlen($str); $i ++){
                for ($j=0; $j <strlen($decrypt_key); $j ++){
                        if ($str[$i] == $decrypt_key [$j]){
                                $enstr .=  $encrypt_key[$j];
                                break;