PHP switch case $_GET's variables and switch case $_GET's variable's values

Question

Say I have an URL like www.mysite.com/index.php?login=0. Is it possible to switch case $_GET's variables and switch case $_GET's variable's values?

Something like:

switch ($_GET) {
    case 'login' :
        switch($_GET['login']) {
            case '0' :
                echo 'Login failed!';
                break;
            case '1' :
                echo 'Login successful.';
                break;
        }
        break;
    case 'register' :
        switch ($_GET['register']) {
            case '0' :
                echo 'Registration failed!';
                break;
            case '1' :
                echo 'Thank you for registering.';
                break;
        }
        break;
    default :
        echo 'Some other message';
        break;
}

I'm not sure if switch case can be used on associative arrays. What am I doing wrong? Cheers!

As long as you use switch-case for all your values, your code is also very secure, since you never use any of the user provided values directly. — Prof. Falken
– Prof. Falken, Commented May 20, 2013 at 19:11

Prof. Falken · Accepted Answer · 2013-05-20 15:15:00Z

11

You have to enclose the switch in a foreach() loop.

foreach ($_GET as $key => $value) {
    switch ($key) {
        case 'login' :
            switch ($value) {
                case '0' :
                    echo 'Login failed!';
                    break;
                case '1' :
                    echo 'Login successful.';
                    break;
            }
            break;
        case 'register' :
            switch ($value) {
                case '0' :
                    echo 'Registration failed!';
                    break;
                case '1' :
                    echo 'Thank you for registering.';
                    break;
            }
            break;
        default :
            echo 'Some other message';
            break;
    }
}

edited May 20, 2013 at 15:15

answered May 20, 2013 at 13:19

Prof. Falken

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1 Comment

webbiedave Over a year ago

+1 But you can change switch($_GET['login']) and the like to just switch($value)

Useless Intern · Accepted Answer · 2013-05-20 13:23:42Z

0

I do not think it will work like this, $_get will return an array and these comparisons will not work. Switch statements need to evaluate to a constant.

answered May 20, 2013 at 13:23

Useless Intern

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Comments

AlexioVay · Accepted Answer · 2023-04-05 15:15:50Z

Maybe this helps someone nowadays using at least PHP8. You can make the code shorter and more concise using the match expression:

foreach ($_GET as $key => $value) {
    echo match ($key) {
        'login' => match ($value) {
            '0' => 'Login failed!',
            '1' => 'Login successful.',
            default => 'Some other login message',
        },
        'register' => match ($value) {
            '0' => 'Registration failed!',
            '1' => 'Thank you for registering.',
            default => 'Some other register message',
        },
        default => 'Some other message',
    };
}

This code uses the match expression, which was introduced in PHP 8, to simplify the nested switch statements. The match expression returns the value of the matching case directly.

Jaid07 · Accepted Answer · 2013-05-20 13:31:55Z

-2

Just Use this:

switch($_GET['key']) //it will return you value of particular parameter.
case 'value1':
//write your statement here.
break;
case 'value2':
//write your statement here.
break;
//and so on

answered May 20, 2013 at 13:31

Jaid07

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