How handle errors in php script fired by Jquery.ajax? - php

Question

I have php-script, firing with jquery ajax function. Somthing like this:
$("a.test").click (function () {
var new_id = $(this).attr("new_id");
$.ajax({
url: 'test.php',
type: "POST",
cache: false,
async: true,
data: ({
new_id : new_id
}),
success: function (data) {
alert (data);
},
error: function(){
alert('error');
}
});
return false;
});
Now, a have some errors in test.php, but I can't see them. Sript just runs and I have no feedback, only error alert (alert ('error')).
How can I get back errors, that I have in test.php to handle them?

Answer 1

If you echo the errors in test.php, you can simply do:
$.ajax({
url: 'test.php',
type: "POST",
cache: false,
async: true,
data: ({
new_id : new_id
}),
success: function (data) {
alert (data);
},
error: function(data){
alert('error:'+data);
}
});
return false;
});
Edit:
I usually do something like this. In test.php if you get an error, create an array with your error info and echo it json encoded:
$message=array('error' => 1,'message' => '<div class="alert alert-danger" role="alert">' . $login['message'] . '</div>' );
echo json_encode($message);
Now in your jquery you can retrive the error by:
success: function (data) {
alert (data);
},
error: function(data){
var obj = JSON.parse(data);
alert(obj.message);
}
When you have it in array like this you dont even need error: function(data) anymore, since you can simply:
success: function (data) {
var obj = JSON.parse(data);
if (obj.error) {
// do something
alert (obj.message);
}else{
// do something else
}
},

Answer 2

On test.php you could show errors using the code explained here: https://stackoverflow.com/a/21429652/6525724
And then on this page instead of alert('error') you could use alert(data).

Answer 3

Try this
error: function(XMLHttpRequest, textStatus, errorThrown) {
alert("Status: " + textStatus); alert("Error: " + errorThrown);
}