if else condition in jquery ajax response - php

Question

I have one Ajax function which is running properly.but i want when my Ajax response is
<h3>No Couriers found near by you.please select another location</h3>
i want to display some error message else i want to display another map div in else condition.
but every time when i hit Ajax only else condition is working..but when i alert response and see the output it shows this message when
<h3>No Couriers found near by you.please select another location</h3>
but still it not comes in if condition..can anyone help me to do this....
<script>
$('#weight0,#weight1,#weight2,#weight3').click(function() {
var checked = $(this).is(':checked');
if($(this).is(":checked")) {
$.ajax({
type: "POST",
url: '<?php echo Router::url(array("controller" => "Orders","action" => "searchCourier")); ?>',
data: {
frmlat: $("#PoolLatitude").val(),
frmlong: $("#PoolLongitude").val(),
mylocation: $("#PoolLocation").val()
},
dataType: "html",
success: function(response) {
alert(response);
if(response =="<h3>No Couriers found near by you.please select another location</h3>"){
alert(thanks);
} else {
$('#map_canvas').css('display', 'none');//used to hide map after ajax success response.
$("#load_map").html(response);
}
},
complete: function() {
$('.spinicon').hide();
}
});
} else {
$("#secretcode").val("");
}
});
</script>

Answer 1

In your php script, return a boolean flag instead of a string :
<?php
if (some_condition) {
$return = true;
} else {
$return = false;
}
die(json_encode(array('return' => $return)));
And in the ajax success :
...
dataType: 'json',
success: function(data) {
if (data.return) {
alert("return is true");
} else {
alert("return is false");
}
},
...
Hope it helps.
PS : use Json Encode to parse the response and access values easily.

Answer 2

First of all, i suggest you to use status for ajax response something like:
1 for success
0 for failure
Than, as per your statement, your are getting the correct response in:
alert(response);
Than, you must need to check either response having <h3></h3> tags or not.
In your code, the main issue is that, you are using string without quotes in alert alert(thanks); this will return undefined thanks in console and treated as a variable.
This should be alert("thanks");
One more suggestion, it's always better to check browser console when you are not getting success in Ajax or any other script, this will help you to find the errors.