How to pass a Javascript Array to PHP file using AJAX and JSON?

How to pass a Javascript Array to PHP file using AJAX and JSON?

I have an array in javascript and I need to pass this array to a PHP by using AJAX call to that PHP file. I will get this array in PHP file and assign this javascript array to PHP array. Then I will find out the count of that PHP array elements and return it back to the javascript. I will convert JS array in JSON format by JSON.stringify. This is a very simple example on how to pass javascript array to PHP asynchronously. You can perform a lot of operations on this array which you have passed to PHP file but for simplicity I am just returning its count. Let's have a look at the following code snippet.

Javascript Array

var myJSArray = new Array("Saab","Volvo","BMW");

ProcessAJAXRequest() function wil pass JS array to PHP file using AJAX request and will show count of array elements returned by PHP file.

function ProcessAJAXRequest()

{

    $.ajax

    ({

        type: "POST",

        url: "myphpfile.php",

        data: {"myJSArray" : JSON.stringify(myJSArray)},

        success: function (data) 

        {

            alert(data); //count of array elements

        }

    });

}

myphpfile.php

<?php 

    $myPHPArray = json_decode($_POST["myJSArray"]);

    echo count($myPHPArray);

 ?>