Ajax Post not returning proper value - php

Question

I am trying to verify if phone number exists in database when user fills in a number into the form field. I am using Ajax for post and return confirmation.
Everything seems fine except for an error when returning value from external file.
I am not able to pinpoint the exact error reason
The code is as follows
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function() {
// check if input data is number
$('#phone').keyup(function(){isNumber(this);});
//Check the min chars for phone
var min_chars = 10;
//result texts
var characters_error = 'Has to be 10 digits only';
var checking_html = 'Checking...';
//when button is clicked
$('#phone').keyup(function(){
//run the character number check
if($('#phone').val().length != min_chars){
//if it's bellow the minimum show characters_error text '
$('#phone_availability_result').html(characters_error);
}else{
//else show the checking_text and run the function to check
$('#phone_availability_result').html(checking_html);
check_availabilityp();
}
});
});
//function to check phone availability
function check_availabilityp(){
//get the phone
var phone = $('#phone').val();
//use ajax to run the check
$.post("check_phone.php", { phone: phone },
function(resultp){
//if the result is 1
if(resultp == 1){
//show that the phone is available
$('#phone_availability_result').html(phone + ' is Available');
}else if (resultp == 0){
//show that the phone is NOT available
$('#phone_availability_result').html(phone + ' is not Available');
}else{//show that the phone is NOT available
$('#phone_availability_result').html('Something Wrong');}
});
};
//function to check whether input is number
function isNumber(field) {
var re = /^[0-9]*$/;
if (!re.test(field.value)) {
alert('Must be all numeric charcters. Non numerics will be removed from field!');
field.value = field.value.replace(/[^0-9]/g,"");
}
}
</script>
HTML
<input type='text' id='phone' name="phone" maxlength="10">
<div id='phone_availability_result'></div>
PHP Code 'check_phone.php'
<?php
include('connnew.php');
//$phone = mysql_real_escape_string($_POST['phone']);
$resultp = $usersdb->query("SELECT * FROM users WHERE Phone = '$phone'") or die($usersdb->error);
//if number of rows fields is bigger them 0 that means it's NOT available '
if($resultp->num_rows>0){
//and we send 0 to the ajax request
echo 1;
}else{
//and we send 1 to the ajax request
echo 0;
}
?>
I am constantly getting the error "Something Wrong". Though when I independently run the check_phone.php file, it works fine. I guess it is in the return value function that there is some error.
Maybe somebody can help identify the bug.

Answer 1

trim the response values before compare
$.post("check_phone.php", { phone: phone },
function(resultp){
//if the result is 1
if($.trim(resultp) == 1){
//show that the phone is available
$('#phone_availability_result').html(phone + ' is Available');
}else if ($.trim(resultp) == 0){
//show that the phone is NOT available
$('#phone_availability_result').html(phone + ' is not Available');
}else{//show that the phone is NOT available
$('#phone_availability_result').html('Something Wrong');}
});
$phone is commented in this code
$resultp = $usersdb->query("SELECT * FROM users WHERE Phone = '$phone'") or die($usersdb->error);
if($resultp->num_rows>0){
echo 1;
}else{
echo 0;
}
?>

Answer 2

May be you are getting response as string, Try this :
if(resultp == '1' || resultp == 1) {
//show that the phone is available
$('#phone_availability_result').html(phone + ' is Available');
}else if (resultp == '0' || resultp == 0){
//show that the phone is NOT available
$('#phone_availability_result').html(phone + ' is not Available');
}else{//show that the phone is NOT available
$('#phone_availability_result').html('Something Wrong');
}