How can PHP developers effectively integrate jQuery or AngularJS with Ajax for seamless data retrieval and display?

To effectively integrate jQuery or AngularJS with Ajax for seamless data retrieval and display, PHP developers can create PHP scripts that handle Ajax requests and return data in JSON format. They can then use jQuery's $.ajax() function or AngularJS's $http service to make asynchronous requests to these PHP scripts and update the UI with the retrieved data.

<?php
// PHP script to handle Ajax requests and return data in JSON format
if ($_SERVER['REQUEST_METHOD'] == 'GET') {
    // Perform necessary database queries or data retrieval
    $data = array('name' => 'John Doe', 'age' => 30);
    
    // Return data in JSON format
    header('Content-Type: application/json');
    echo json_encode($data);
}
?>