Why is it necessary to store the calculated values in session variables for comparison in PHP scripts?

Storing calculated values in session variables allows for comparison within PHP scripts because session variables persist across multiple page loads for a specific user session. This ensures that the calculated values can be accessed and compared throughout the user's interaction with the website or application. 

<?php
session_start();

// Calculate a value
$calculatedValue = 10 + 5;

// Store the calculated value in a session variable
$_SESSION['calculatedValue'] = $calculatedValue;

// Retrieve the stored value from the session for comparison
if ($_SESSION['calculatedValue'] == 15) {
    echo "The calculated value is 15.";
} else {
    echo "The calculated value is not 15.";
}
?>

Keywords

session variables comparison calculated values PHP scripts necessity

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