Use variable variables with superglobal arrays

Question

I wonder if is possible to read dynamically superglobal variables, I would like to do something like that:

<?php

    $n = 'GET';
    $var = '$_'.$n.'[\'something\']'; // pour lire $_GET['something'] 
    echo $var;

//Or 

    $n = 'POST';
    $var = '$_'.$n.'[\'something\']'; // pour lire $_POST['something'] 
    echo $var;

?>

This code don't work as I want, but I would like to know if is workable in PHP?

Would you please post your complete code? why you want to do this that way? — Keep Coding, Apr 03 '15 at 19:40

score 4 · Accepted Answer · answered Apr 03 '15 at 19:40

You can't use variable variables with superglobals, functions or class methods and not with $this.

And a quote from the manual (It's right before the user comments if you search it):

Warning: Please note that variable variables cannot be used with PHP's Superglobal arrays within functions or class methods. The variable $this is also a special variable that cannot be referenced dynamically.

score 0 · Answer 2 · edited Apr 15 '15 at 00:10

0

Thank you is exactelly what I search

But we can't use that into function please?

$n = '_GET';

// don't work => Undefined variable: _GET
function f($n) {
    echo ${$n}['a'];
}
f($n);

//work fine
echo ${$n}['a'];

edited Apr 15 '15 at 00:10

Marco Bonelli

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answered Apr 03 '15 at 20:09

onnynneji

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Use variable variables with superglobal arrays

2 Answers2