Friday, 4 April 2014

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()
        type: "POST",
        url: "myphpfile.php",
        data: {"myJSArray" : JSON.stringify(myJSArray)},
        success: function (data) 
            alert(data); //count of array elements


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


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  4. +Handling PhP:
    1.tao 1 baseURL variable to get the current url of the file is run
    2.Using $ _POST request from the client to check (using ajax)
    3.sleep (1) / / temporary for 1 second before running to stop => this so you can see clearly the process
    4.Create 1 array member contains the information of members
    5.Using function json_encode (), the goal is to move the newly created array into json string returned to the Client
    6.sau it die: the end is not running anymore (stop after every process returns data)
    +Handling Ajax:
    1. The url: php file path will process your request
    2. Type: The type of data you send to the server (POST, GET)
    3. Data: data is what you post? (GetMember = view)
    4. Success: when the server successfully processed will return here, where you will handle JSON string parsing, and enter data into the textbox.
    => $ User function. ParseJSON (string) to parse JSON string, that string is in the block of data returned from the server.

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