php json data return jquery - php

Question

Looking for a best solution:
$.getJSON("InsertData.php", {fullName:val1, course_id:course_id, occupation:val2}, function(data) {
$.each(data, function(i, user) {
//alert(user.aryA.status);
if(user.aryA.status == 'true'){
currentPosition = 2;
checkData();
nextSlide();
}else{
nextSlide();
}
});
})
Here is php code:
mysql_select_db("db", $con);
$Query="SELECT * from table WHERE fullName='".$fullName."' and course_id='".$cid."'";
$result = mysql_query($Query);
$totalRecords = mysql_num_rows($result);
if($totalRecords) {
while ($row = mysql_fetch_array($result)) {
$returnData[]=array( //for Json data array
'userName' => $row['fullName'],
'aryA' => array(
'status' => $row['status']
)
);
}
}
if(!$totalRecords) {
$insertQuery="INSERT INTO table (fullName,course_id,occupation) VALUES ('".addslashes($fullName)."','".addslashes($cid)."','".addslashes($d3)."')";
$result1 = mysql_query($insertQuery);
}else{
if($stat == "true"){$value = 1;}
}
mysql_close($con);
echo json_encode($returnData);
So In first case when I hit the php through jquery it saves data in database but give me error or length. Because $returnData is empty. Is there a way if $totalRecords is false, how to send json_encode to say there is no data or any value through json_encode to my jQuery function.
Thanks in advance.

Answer 1

Just setup an else statement, and add a 'success' key to your array:
if($totalRecords){
while ($row = mysql_fetch_array($result)) {
$returnData[]=array( //for Json data array
'success'=>'true',
'userName' => $row['fullName'],
'aryA' => array(
'status' => $row['status']
)
);
}
}else{
$returnData = array('success'=>'false');
}
Then check the value of 'success' in your jQuery.
Also, you really shouldn't be using mysql_*.

Answer 2

$returnData = array(); //add this
$totalRecords = mysql_num_rows($result);
if($totalRecords) {
while ($row = mysql_fetch_array($result)) {
$returnData[]=array( //for Json data array
'userName' => $row['fullName'],
'aryA' => array(
'status' => $row['status']
)
);
}
}
else
{
$returnData[] = 'no Record'; //add this
}