How can global variables be effectively used in PHP to pass values between pages?

Global variables in PHP can be effectively used to pass values between pages by declaring the variable as global in both the sending and receiving pages. This allows the variable to retain its value across different pages within the same session. However, it is important to use global variables judiciously as they can lead to potential security risks and code maintainability issues. 

// sending_page.php
$value = "Hello, World!";
$_SESSION['value'] = $value;

// receiving_page.php
session_start();
echo $_SESSION['value'];

Keywords

global variables PHP pass values pages variables

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