How can PHP be used to cache output across multiple pages without losing the ability to switch between pages?

To cache output across multiple pages in PHP without losing the ability to switch between pages, you can use session variables to store the cached data. By storing the cached data in session variables, it will persist across multiple page loads for the same user session. This allows you to cache data for faster loading times while still maintaining the ability to switch between pages. 

<?php
session_start();

// Check if cached data exists in session
if(isset($_SESSION['cached_data'])){
    $cached_data = $_SESSION['cached_data'];
} else {
    // Generate or fetch data to be cached
    $cached_data = "This is the cached data";
    
    // Store data in session variable
    $_SESSION['cached_data'] = $cached_data;
}

// Output cached data
echo $cached_data;
?>

Keywords

PHP caching output multiple pages session management

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