Getting variable from php with jquery json

Question

I am trying to get several variable results from php with jquery json. The problem is that I get null values in the console (on title for example) and script failed. With this script I am trying to populate some input fields with data that is being send from php. I am a noob in ajax json. Please help me.

HTML

<input id="titledata" type="text" name="siteTitle" value="" />
<textarea id="itemDescription" name="description"></textarea>
<input id="suggestkeyworddata" type="text" name="proposalForKeywords" value="" />

JQUERY - here I am trying to get the variables and store them into jquery variables: var title = data.titledata;....

<script type="text/javascript">
$(function checkdomain() {
 jq2('#metaTagButtonz').on('click', function (e) {
 $.ajax({
 type: 'post',
 url: 'getallinfos.php',
 data: $('#urlpr').serialize(), // sending data to php from this field
 dataType: 'json',
 success: function (data) {
 $("#domain-hits").html(data);
 // here i am trying to get data from php
 var title = data.titledata; 
 var description = data.descriptiondata;
 var keywords = data.keywordsdata;
 // here I am trying to populate the data into the 
 // input fields
 $('#titledata').val(title); 
 $('#itemDescription').val(description);
 $('#keywordswebsite').val(keywords);
 }
 });
 e.preventDefault();
 });
});
</script>

PHP

 //$title, $descr, and $keywords are strings 
 (sometimes empty sometime have values depending on the website)
$data = array(
 'titledata' => $title,
 'descriptiondata' => $descr,
 'keywordsdata' => $keywords,
);
$data = json_encode($data);

Answer 1

You just need to print the actual content from your php script:

header('Content-Type: application/json');
echo json_encode($data);

• user3650099: ok, working on getting the data now, but is not populating the fields.
• user3650099: In the console I am getting "{\"titledata\":\"TITLE OF SITE\",\"descriptiondata\":\"DESCRIPTION OF SITE\",\"keywordsdata\":\"KEYWORDS OF SITE\"
• user3650099: Tried on doing an alert(titledata); And I get the alert box containing object HTMLInputElement
• Stefano Ortisi: So now you need to fix your backend code. It depends on what you're doing before printing the data.
• user3650099: All of the variables in php mentioned contain the data, but it's not outputted correctly, don't understand why not.