Ajax return true or false from a function javascript

asynchronous javascript and xml

In this tutorial, we will creating a function javascript which contains ajax returning by ‘1’ or ‘0’ (true or false).

Oke, create a file index.php :

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

function ajaxReturn(){

	formData= new FormData();
	formData.append('value', 'true');

	var jqXHR = $.ajax({
		type: 'POST',
		url: 'request.php',
		data: formData,
		processData: false,
		contentType: false,
		async: false,

	// return 1 or 0
	return jqXHR.responseText;

function btn()

	if(ajaxReturn() == 1)


<button onclick="btn()">Get return</button>

When button clicked, will be calling a function btn() and then running function ajaxReturn().
In ajaxReturn() will returning by ‘ jqXHR.responseText‘.

The script above, ajax will sending request to ‘request.php’.
So, we must creating request.php :

	$val = $_POST['value'];

	if($val == 'true')
		echo '1';
		echo '0';

You can try demo :


Ambar Hasbiyatmoko

Hello, I'm web developer. Passionate about programming, web server, and networking.

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