I am having trouble with my jquery script below, this is a basic stripped down version and even it will not work, I have the php file that the jquery script makes a call to
Your PHP array is defined as:
$arr = array ('resonse'=>'error','comment'=>'test comment here');
Notice the mispelling "resonse". Also, as RaYell has mentioned, you have to use data instead of json in your success function because its parameter is currently data.
Try editing your PHP file to change the spelling form resonse to response. It should work then.