Send array values from PhP form to JavaScript


Having a PhP form, we need to manipulate in JavaScript an object that depends on the form input.


The best way to do it is to use an encoded JSON object or an AJAX call. The AJAX call is pretty straight forward, but the use of a JSON object is recommended due to it’s ease of use and limited calls to the script.

In the case we have a form with checkboxes we need to send a whole object, or array, we first encode the JSON in PHP with json_encode() , send it as string in the checkbox value and in the javaScript function we only need to decode it , or evaluate it with eval() .

In PhP:

$arrayObject = array(‘id’ => $objectId, ‘name’ => $objectName, ‘price’ => $objectPrice, ‘description’ => $objectDescription);
<span><input name=’object’ type=’checkbox’ value='<?=json_encode($arrayObject)?>’></span>

Then, in JavaScript, for each checked checkboxes:

var decodedArray = eval(‘(‘+checkedItems[i].value+’)’);
var id =;
var name=;
var price= decodedArray.price;
var description= decodedArray.description;

Of course in JavaScript you have to define how to get the checked checkboxes, or use ExtJS or other framework.

About admin

Just another php developer trying to give something back to the community.
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2 Responses to Send array values from PhP form to JavaScript

  1. Iman says:

    thanks that was useful

  2. “It’s actually a great and useful piece of information. I’m satisfied that you shared this helpful info with us. Please keep us informed like this. Thank you for sharing.”

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