What are the advantages and disadvantages of using AJAX or fetch to handle data retrieval in PHP for JavaScript manipulation?

When handling data retrieval in PHP for JavaScript manipulation, using AJAX or the newer fetch API can greatly improve the user experience by allowing for asynchronous data retrieval without refreshing the entire page. This can result in faster loading times and a more dynamic user interface. However, it's important to consider the potential security risks of exposing sensitive data through client-side JavaScript and to properly handle error responses to ensure a smooth user experience. 

<?php
// PHP code to handle data retrieval
if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    $data = ['example1', 'example2', 'example3'];
    
    header('Content-Type: application/json');
    echo json_encode($data);
}
?>

Keywords

AJAX fetch data retrieval PHP JavaScript manipulation

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