<?php

// Define a flag for dry-run mode

session_start();

$dryRun = isset($_GET['dryRun']) && $_GET['dryRun'] === 'true';

// Function to replace session cookie values with fallback logic

function replaceSessionValues($data) {

global $dryRun;

if ($dryRun) {

// Dry-run: Log the changes instead of applying them.

error_log("Dry-run: Would set session values: " . print_r($data, true));

return; // Don't actually set the cookies. Important!

}

// Apply session value changes

foreach ($data as $key => $value) {

$_SESSION[$key] = $value;

}

}

// Example usage (replace with your actual logic)

if ($_SERVER['REQUEST_METHOD'] === 'POST') {

// Simulate data to be set in session

$sessionData = [

'username' => 'testuser',

'user_id' => 123,

'last_login' => date('Y-m-d H:i:s')

];

// Replace session values with fallback logic

replaceSessionValues($sessionData);

//Example setting a value with fallback

$_SESSION['fallback_value'] = 'default_value'; // This will set the value even in dry-run mode.

echo "Session values updated (or would be updated in dry-run).";

}

?>