Ajax doesn't call server side function when jquery handler is fired - php

Question

I'm building a simple forum on which I have a user details page with two text fields, one for the user's biography and another for his interests.
When the user clicks on the save icon, a handler on the jquery is suposed to call an ajax call to update the database with the new value of the biography/interests but the ajax call isn't being called at all and I can't figure it out since I don't find any problems with the code and would apreciate if someone could take a look at it.
this is the textarea:
<textarea rows="4" cols="50" id="biography" readonly><?php if($info['bio'] == "") echo "Não existe informação para mostrar";
else echo $info['bio']; ?></textarea>
Here is the icon the user clicks on:
<li style="display:inline;" class="infoOps-li"><img class="info-icons" id="save1" src="assets/icons/save.png" alt=""></li>
this is the jequery with the ajax call:
$("#save1").click(function(){
var bio = $("#biography").val();
alert(bio); //this fires up
$.ajax({
url:"assets/phpScripts/userBioInterest.php", //the page containing php script
type: "post", //request type,
dataType: 'json',
data: {functionName: "bio", info:bio},
success:function(result){
alert(result.abc); //this doesn't fire
}
});
$("#biography").prop("readonly","true");
});
I know that the jquery handler is being called correctly because the first alert is executed. The alert of the ajax success function isn't, so I assume that the ajax call isn't being processed.
On the php file I have this:
function updateBio($bio)
{
$user = $_SESSION['userId'];
$bd = new database("localhost","root","","ips-connected");
$connection = $bd->getConnection();
if($bio == "")
{
echo json_encode(array("abc"=>'empty'));
exit();
}
if($stmt = mysqli_prepare($connection,"UPDATE users SET biografia = ? WHERE user_id = ?"))
{
mysqli_stmt_bind_param($stmt,'si',$bio,$user);
mysqli_stmt_execute($stmt);
mysqli_stmt_close($stmt);
echo json_encode(array("abc"=>'successfuly updated'));
}
$bd->closeConnection();
}
if(isset($_POST['functionName']))
{
$function = $_POST['functionName'];
echo $function;
if(isset($_POST['info']))
$info = $_POST['info'];
if($function == "bio")
{
updateBio($info);
}
else if($function == "interest")
{
updateInterests($info);
}
}
Can anyone shed some light on why isn't the ajax call being called?
Thank you
EDIT: changed "function" to "functionName" in json data object as suggested.

Answer 1

A possible problem is dued to a wrong parsing of the PHP output (for example due to a PHP error). You are reading the output as JSON, so if the output is not a JSON, success callback will not be triggered.
$("#save1").click(function(){
var bio = $("#biography").val();
alert(bio); //this fires up
$.ajax({
url:"assets/phpScripts/userBioInterest.php",
type: "post", //request type,
dataType: 'json',
data: {function: "bio", info:bio},
success:function(result){
alert(result.abc); //this doesn't fire
},
error: function(result){
alert("An error has occurred, check the console!");
console.log(result);
},
});
$("#biography").prop("readonly","true");
});
Try with this code, and check if an error is printed to the console.
You can use complete too, check here: http://api.jquery.com/jquery.ajax/