What is the usage of $GLOBALS in php

The usage of $GLOBALS in php is to reference all variables available in the global scope, such as [$GLOBALS["foo"]]. $GLOBALS is a global combined array containing all variables.

The operating environment of this article: windows10 system, php 7.3, thinkpad t480 computer.

$GLOBALS is used to reference all variables available in the global scope. It is a global combined array containing all variables. The name of the variable is the key of the array.

Example:

<?php
function test() {
    $foo = "local variable";

    echo &#39;$foo in global scope: &#39; . $GLOBALS["foo"] . "\n";
    echo &#39;$foo in current scope: &#39; . $foo . "\n";
}

$foo = "Example content";
test();
?>

The output of the above routine is similar to:

$foo in global scope: Example content
$foo in current scope: local variable

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