How to access a global variable in a PHP function

0 votes

According to the most programming languages scope rules, I can access variables that are defined outside of functions inside them, but why doesn't this code work?

<?php
    $data = 'My data';

    function menugen() {
        echo "[" . $data . "]";
    }

    menugen();
?>

The output is [].

Nov 10, 2020 in PHP by kartik
• 37,510 points
2,560 views

1 answer to this question.

0 votes

Hello @kartik,

It is not working because you have to declare which global variables you'll be accessing:

$data = 'My data';

function menugen() {
    global $data; // <-- Add this line

    echo "[" . $data . "]";
}

menugen();

Otherwise you can access it as $GLOBALS['data'].

Hope it helps!!

Thank you!!

answered Nov 10, 2020 by Niroj
• 82,780 points

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