Are there any specific PHP functions or commands that are commonly used for updating specific parts of a webpage without reloading the entire page?

To update specific parts of a webpage without reloading the entire page, you can use AJAX (Asynchronous JavaScript and XML) in combination with PHP. AJAX allows you to send requests to the server in the background and update specific parts of the webpage dynamically. In PHP, you can create a script that processes the AJAX request, retrieves the necessary data, and returns it to the client-side JavaScript for updating the webpage. 

<?php
// PHP script to process AJAX request and return updated content

// Check if the request is an AJAX request
if(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
    
    // Retrieve data from the request
    $data = $_POST['data'];
    
    // Process the data (e.g., query a database, perform calculations)
    $updatedContent = 'Updated content based on data: ' . $data;
    
    // Return the updated content
    echo $updatedContent;
    
} else {
    // Handle non-AJAX requests
    echo 'Invalid request';
}
?>

Keywords

PHP AJAX jQuery DOM manipulation XMLHttpRequest

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