How can the issue of variables being overwritten when navigating between pages be addressed in PHP?

When navigating between pages in a PHP application, variables can be overwritten if they are not properly handled. One way to address this issue is to use sessions to store variables that need to persist across different pages. By storing variables in session variables, they can be accessed and modified across different pages without being overwritten. 

// Start the session
session_start();

// Set a variable in the session
$_SESSION['variable_name'] = 'value';

// Retrieve the variable from the session
$variable = $_SESSION['variable_name'];

// Modify the variable in the session
$_SESSION['variable_name'] = 'new_value';

Keywords

Variable scope session variables global keyword $_SESSION superglobal persistent data.

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