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, I have it set to encode and show a json response
Then in the jquery script it should read the value and respond to it but It is not getting the response.
Is json.response the wrong way to call a variable in the json string that is name response?
Can someone help please I am stuck
<?PHP
header('Cache-Control: no-cache, must-revalidate');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Content-type: application/json');
// set to retunr response=error
$arr = array ('resonse'=>'error','comment'=>'test comment here');
echo json_encode($arr);
?>
//the script above returns this:
{"response":"error","comment":"test comment here"}
<script type="text/javascript">
$.ajax({
type: "POST",
url: "process.php",
data: dataString,
dataType: "json",
success: function (data) {
if (json.response == 'captcha') {
alert('captcha');
} else if (json.response == 'error') {
alert('sorry there was an error');
} else if (json.response == 'success') {
alert('sucess');
};
}
})
</script>
UPDATE;
I have changed
json.response
into
data.response
But this did not make it ork either
Here's the script, rewritten to use the suggestions above and a change to your no-cache method.
<?php
// Simpler way of making sure all no-cache headers get sent
// and understood by all browsers, including IE.
session_cache_limiter('nocache');
header('Expires: ' . gmdate('r', 0));
header('Content-type: application/json');
// set to return response=error
$arr = array ('response'=>'error','comment'=>'test comment here');
echo json_encode($arr);
?>
//the script above returns this:
{"response":"error","comment":"test comment here"}
<script type="text/javascript">
$.ajax({
type: "POST",
url: "process.php",
data: dataString,
dataType: "json",
success: function (data) {
if (data.response == 'captcha') {
alert('captcha');
} else if (data.response == 'success') {
alert('success');
} else {
alert('sorry there was an error');
}
}
}); // Semi-colons after all declarations, IE is picky on these things.
</script>
The main issue here was that you had a typo in the JSON you were returning ("resonse" instead of "response". This meant that you were looking for the wrong property in the JavaScript code. One way of catching these problems in the future is to console.log the value of data and make sure the property you are looking for is there.
Learning how to use the Chrome debugger tools (or similar tools in Firefox/Safari/Opera/etc.) will also be invaluable.
Look out for this pitfal: http://www.vertstudios.com/blog/avoiding-ajax-newline-pitfall/
Searched several houres before I found there were some linebreaks in the included files.
You should use data.response in your JS instead of json.response.
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.
Source: Stackoverflow.com