What is the recommended way to update a counter on a webpage without refreshing the entire page in PHP?

To update a counter on a webpage without refreshing the entire page in PHP, you can use AJAX (Asynchronous JavaScript and XML) to send a request to the server to increment the counter and then update the counter on the webpage dynamically. This allows for a seamless user experience without the need to reload the entire page. 

<?php
// Increment counter and return new count
$counterFile = 'counter.txt';
$counter = (file_exists($counterFile)) ? file_get_contents($counterFile) : 0;
$counter++;
file_put_contents($counterFile, $counter);
echo $counter;
?>

Keywords

AJAX JavaScript jQuery XMLHttpRequest setInterval

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