Username Validation in Ajax&Js

Username Validation in Ajax&JS

Download: Scripts

                      

index.php:

<div class="row">Username:
<input type="text" id="uname" name="uname" value="" />
<input type="button" onclick="validate();" value="Check Availability" /><br />
<div id="msg"></div>  

validate.php: 

<?php
 
$user = strip_tags(trim($_REQUEST['username']));
if(strlen($user) <= 0)
{
  echo json_encode(array('code'  =>  -1,
  'result'  =>  'Invalid username, please try again.'
  ));
  die;
}
 $query = "Select * from USERS where username = '$user' ";
$available = true;
 
if($available)
{
  echo json_encode(array('code'  =>  1,
  'result'  =>  "Success,username $user is still available"
  ));
  die;
}
else
{
  echo  json_encode(array('code'  =>  0,
  'result'  =>  "Sorry but username $user is already taken."
  ));
  die;
}
?>