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
• 37,520 points
7,345 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
• 82,840 points

Related Questions In PHP

0 votes
0 answers

How to access function value in another function in PHP Classes

How can I return a variable value ...READ MORE

Jun 10, 2022 in PHP by narikkadan
• 63,600 points
1,051 views
0 votes
1 answer

How to include a PHP variable inside a MySQL statement?

Hii, You can try this: $query="SELECT * FROM CountryInfo ...READ MORE

answered Apr 9, 2020 in PHP by Niroj
• 82,840 points
17,075 views
0 votes
1 answer

How to implement a callback in PHP?

Hello, Implementation of a callback is done like ...READ MORE

answered Apr 15, 2020 in PHP by Niroj
• 82,840 points
1,037 views
0 votes
1 answer

How can I connect to a Tor hidden service using CURL in PHP?

Hello @kartik, I use Privoxy and cURL to scrape Tor ...READ MORE

answered May 19, 2020 in PHP by Niroj
• 82,840 points
5,360 views
+1 vote
1 answer

How to make anchor tag with routing using Laravel?

Hey @kartik, First you have to go to ...READ MORE

answered Mar 18, 2020 in Laravel by Niroj
• 82,840 points
23,090 views
0 votes
1 answer

What is redirection in Laravel?

Named route is used to give specific ...READ MORE

answered Mar 18, 2020 in Laravel by Niroj
• 82,840 points
3,019 views
0 votes
1 answer

How to install Laravel via composer?

Hello, This is simple you just need to ...READ MORE

answered Mar 23, 2020 in Laravel by Niroj
• 82,840 points
2,951 views
+1 vote
1 answer

What are named routes in Laravel and How can specify route names for controller actions?

Hey @kartik, Named routing is another amazing feature of ...READ MORE

answered Mar 23, 2020 in Laravel by Niroj
• 82,840 points
44,894 views
0 votes
1 answer

How to access array returned by a function in php?

Hello @kartik, Since PHP 5.4 it's possible to ...READ MORE

answered Nov 10, 2020 in PHP by anonymous
• 82,840 points
869 views
0 votes
1 answer

How can I declare a global variable in php?

Hello @kartik, The $GLOBALS array can be used instead: $GLOBALS['a'] = ...READ MORE

answered Oct 1, 2020 in PHP by Niroj
• 82,840 points
828 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP