java script array of objects to php via ajax (jquery) and json

Question

Here is javascript code:

var jsonData = JSON.stringify(testObj);
 $.ajax({
 url: '../php/functions/spesific_field_set.php',
 type: 'post',
 data: {fieldObjArray: jsonData, tableName: fieldTableName}
 }).always(SpesificPropertiesSet);

and here is the php:

$updates = mysql_real_escape_string($_POST['fieldObjArray']);
$updates = json_decode($updates, true);
$tableName = mysql_real_escape_string($_POST['tableName']);
echo $updates;

What testObj is an array of object, how should I pass it to the php? and how should I access the data within this array of objects on php side?

thanks!!

• Michael Berkowski: var_dump($updates) after you json_decode() it to see what it looks like, and you'll have your answer.
• Michael Berkowski: By the way, unless you are inserting the whole JSON string directly into your database (which may be indicative of a poor design), don't call mysql_real_escape_string() on the input JSON from $_POST..
• Dagg Nabbit: possible duplicate of How to pass data from Javascript to PHP and vice versa?
• Felix Kling: Learn about arrays: php.net/manual/en/language.types.array.php

Answer 1

This is the PHP file. This should show you how you can access $updates that was sent through AJAX.

$updates = $_POST['fieldObjArray'];
$updates = json_decode($updates, true);
$tableName = $_POST['tableName'];
echo $updates; // this is an array so this would output 'Array'
foreach ($updates as $key => $value) {
 echo 'Key: '.$key.' Value: '.$value.'<br />'; // to access this, just use $updates['key']
}
// example
echo $updates['something'];

• rationalboss: www.php.net/json_decode --> **assoc**: When TRUE, returned objects will be converted into associative arrays. This was initially set to true in the OP's code
• Michael Berkowski: indeed, sorry I missed that. Still though, it is going to be a 2D array, so the 1D loop will just output Array,Array,Array