What are best practices for passing variables between different pages in PHP to ensure correct values are received?

When passing variables between different pages in PHP, it is best practice to use methods like sessions or query parameters to ensure that the correct values are received. Sessions can store variables across multiple pages for a single user, while query parameters can pass variables through the URL. This helps maintain data integrity and security. 

// Sending variable using sessions
session_start();
$_SESSION['variable_name'] = $value;

// Receiving variable on another page
session_start();
$received_value = $_SESSION['variable_name'];

// Sending variable using query parameters
<a href="nextpage.php?variable_name=<?php echo $value; ?>">Next Page</a>

// Receiving variable on nextpage.php
$received_value = $_GET['variable_name'];

Keywords

PHP variable passing sessions cookies GET and POST parameters

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