/Javascript/jQuery/JQuery Validate remote method usage to check if username already exists

JQuery Validate remote method usage to check if username already exists

//HTML
$("#signupForm").validate({
  rules: {
    username: {
      required: true,
      minlength: 3,
      remote: "check-username.php"
    }
  },
  messages: {
    username:{
      remote: "This username is already taken! Try another."
    }
  }
});

//PHP code of check-username.php
<?php

header('Content-type: application/json');
$request = $_REQUEST['username'];

$query = mysql_query("SELECT * FROM mmh_user_info WHERE username ='$username'");
$result = mysql_num_rows($query);
if ($result == 0){
$valid = 'true';}
else{
$valid = 'false';
}
echo $valid;
exit;
?>

Source: stackoverflow.com

Similar codes

0 vote181 views1 answer
.html jquery in javascript
Javascript jQuery
-1 vote204 views1 answer
Trigger jquery autocomplete on click
Javascript jQuery
0 vote177 views1 answer
Saber el alto de un div jquery
Javascript jQuery
0 vote221 views2 answers
View my password jquery
Javascript jQuery
1 vote187 views1 answer
Jquery: get class list using element id
Javascript jQuery
0 vote869 views1 answer
Notification like whatsapp in jquery
Javascript jQuery
0 vote240 views1 answer
Mousemove jquery
Javascript jQuery
0 vote193 views1 answer
Select selectedindex jquery
Javascript jQuery
0 vote184 views1 answer
Jquery boilerplate
Javascript jQuery
0 vote180 views1 answer
Make form submit on new tab using jquery
Javascript jQuery