为什么php阅读反斜杠？

Question

I have a code that saves data to a cookie. and the data saved in the cookie is like this:

(%22Lynyrd%20Skynyrd%22%3D%3Earray(%226983887641%22)%2C%20(%22Rod%20Stewart%22%3D%3Earray(%2259088763306%22)%2C%20(%22Led%20Zeppelin%20Official%22%3D%3Earray(%22131572223581891%22)%2C%20(%22Black%20Sabbath%22%3D%3Earray(%2256848544614%22)%2C%20(%22Hadag%20Nahash%20%D7%94%D7%93%D7%92%20%D7%A0%D7%97%D7%A9%22%3D%3Earray(%22116542622632%22)%2C%20

and when i read it with this php:

<?php
    if (isset($_COOKIE["currentsearchctrl"])) {
        $cookz = $_COOKIE["currentsearchctrl"];
        echo $cookz;

    } else {
        echo 'cookie not set';
    } ?>

It returns with this:

(\"Lynyrd Skynyrd\"=>array(\"6983887641\"), (\"Rod Stewart\"=>array(\"59088763306\"), (\"Led Zeppelin Official\"=>array(\"131572223581891\"), (\"Black Sabbath\"=>array(\"56848544614\"), (\"Hadag Nahash הדג נחש\"=>array(\"116542622632\"),

The problem are the backslashes. I was going to: $data = array($cookz); but it doesn't work.

any ideas?

Answer 1

It's because magic quotes is enabled on the host. It's a horrible "feature" and everybody wishes it would just die.

If you can edit php.ini on the server, set magic_quotes_gpc = Off and magic_quotes_runtime = Off.

Otherwise, if Apache is the HTTP server, there is a .htaccess trick you can use, documented here.

Otherwise, you have to use stripslashes() to get data back to normal. Here is the include'd script I use to disable magic quotes when it isn't possible to disable it another way:

if (get_magic_quotes_gpc()) {
    function array_stripslashes(&$array) {
        foreach($array as $k => $v) {
            if (is_array($v)) {
                array_stripslashes($array[$k]);
            } else {
                $array[$k] = stripslashes($v);
            }
        }
    }
    array_stripslashes($_GET);
    array_stripslashes($_POST);
    array_stripslashes($_COOKIE);
    array_stripslashes($_REQUEST);
}

set_magic_quotes_runtime(0);