How Can I Create a Simple AJAX \'Hello World\' Example with PHP and jQuery?

AJAX with PHP: A Basic Demonstration

Colin, a self-taught PHP developer, encountered challenges in implementing AJAX for real-time page updates. After unsuccessful attempts using self-made scripts and example code from the internet, he seeks a proven functional example for a basic "hello world" demonstration.

Solution

Utilizing jQuery, Colin can simplify the AJAX implementation process. Here's a straightforward example:

1. Create PHP Script (hello.php):

echo "Hello World";

2. Main Page:

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<script type="text/javascript">
  $(function() {
    $.get("hello.php", function(data) { alert(data); });
  });
</script>

Upon page load, the jQuery code will send an HTTP GET request to hello.php, and the server's response ("Hello World") will be displayed in an alert box. This demonstrates the basic principle of AJAX for dynamic content updates.

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