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in your ajax call, you need to specify the data type; for example:
$.ajax({ url:url, type:"POST", data:data, dataType:"json", success:function(){...}})and in your php file, make sure to json_encode your response (note that you might need to set your response headers to application/json)
It is very simple to pass a PHP array to JS using Ajax and Json. You can send an array from PHP using JSON_ENCODE function from PHP and get it using JSON_DECODE function in JS.
Here is a simple example:
JS
$.post("example.php", { user_id:10 } , function( data ){
alert( data.user_info.user_id );
alert( data.user_info.user_name );
// Do something as per your logic.}, "json");
exmple.php
<?php
$q = "SELECT * FROM users WHERE user_id = ".$_POST['user_id'];
$r = mysql_query( $q );
$user_info = mysql_fetch_array( $r, MYSQL_ASSOC );
echo json_encode( array( "user_info" => $user_info ));
?>
Enjoy coding :) !!
Instead of using an array, you should use an object literal (~= assoc array in php).
You can email me the code if need more help I will have a look and feel then we will suggest you something better..
