How can PHP interact with JavaScript to update values on the same page without violating the Same-Origin Policy?

PHP can interact with JavaScript on the same page by using AJAX (Asynchronous JavaScript and XML) requests. This allows PHP to send data to JavaScript without violating the Same-Origin Policy. By making an AJAX request to a PHP script on the same domain, PHP can update values on the page dynamically without any issues. 

<?php
// PHP code to handle AJAX request
if(isset($_POST['data'])) {
    // Process data from AJAX request
    $data = $_POST['data'];
    
    // Perform any necessary calculations or operations
    
    // Return updated values back to JavaScript
    echo json_encode($updatedValues);
}
?>

Keywords

PHP JavaScript Same-Origin Policy AJAX Cross-Origin Resource Sharing

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