Error Global Variable is not accessable to local function

Question

hii,

I'm having an error when variable $x is accessed by function myTest. Can someone let me know how can i used global varaible?

<?php
$x = 5; // global scope

function myTest() {
    // using x inside this function will generate an error
    echo "<p>Variable x inside function is: $x</p>";
}
myTest();

echo "<p>Variable x outside function is: $x</p>";
?>

Answer 1

Hey kartik,

A variable declared outside a function has a GLOBAL SCOPE and can only be accessed outside a function:

The global keyword is used to access a global variable from within a function.

To do this, use the global keyword before the variables (inside the function):

Example:

<?php
$x = 5;
$y = 10;

function myTest() {
    global $x, $y;
    $y = $x + $y;
}

myTest();
echo $y; // outputs 15
?>