How can PHP output buffering be used to cache a webpage before displaying it?

When using PHP output buffering, we can cache a webpage before displaying it by capturing the output generated by the script and storing it in a variable. This allows us to manipulate the content before sending it to the browser, such as saving it to a file for future use. By buffering the output, we can improve the performance of our website by reducing the time needed to generate the page on subsequent requests.

<?php
ob_start(); // Start output buffering

// Your PHP code to generate the webpage content goes here

$content = ob_get_clean(); // Get the buffered output and store it in a variable

// Save the content to a file for caching purposes
file_put_contents('cached_page.html', $content);

// Display the cached content to the user
echo $content;
?>