PHP to determine if the method of Ajax request _php Tips

The example in this article describes the way PHP is judged to be an AJAX request. Share to everyone for your reference, specific as follows:

First of all, how to distinguish the front end using JQuery:

When JQuery makes an AJAX request, it adds a message named X-requested-with to the request header, which reads: XMLHttpRequest

You can use $_server["Http_x_requested_with" on the back end to get it. (Note: The underscore is underlined, case-insensitive)

From this, we can determine whether the AJAX request:

if (Isset ($_server["Http_x_requested_with"]) && strtolower ($_server["Http_x_requested_with"]) = = " XMLHttpRequest ") { 
  //Ajax request processing mode 
}else{ 
  //Normal request processing mode 
};

When Ajax requests are made using native JavaScript, we can also add information to the head to make it easier for the back-end students to distinguish between the following methods:

var xmlhttp=new xmlhttprequest (); 
Xmlhttp.open ("Get", "test.php", true); 
Xmlhttp.setrequestheader ("X-requested-with", "XMLHttpRequest"); 
Xmlhttp.send ();

For more information about PHP interested readers can view the site topics: "Php+ajax Skills and Application Summary", "PHP Network Programming Skills Summary", "PHP object-oriented Program Design Introduction Tutorial", "PHP string (String) Usage Summary", "php+ MySQL Database operations Introduction tutorial and PHP Common database operation Skills Summary

I hope this article will help you with the PHP program design.