php - How to callback ajax request separate -

i'm learning way work ajax php send request with;

    $.ajax({         url: 'check_exists.php',         type: "post",         data: registerform.serialize(),         success: function(data) {             console.log(data)             registermsg = $('.registermsg');             if (data == 'nickname_exists') {                  nickname.addclass('error');              } else if (data == 'email_exists') {                  email.addclass('error');              } else {                 registermsg.html('');              }         }     }); 

now send php file , checks if data exists if input nickname nickname_exist , if same email email_exists back.

but if both data console.log nickname_existsemail_exists way doesn't trigger if statement.

i send php file like;

require_once('db_connect.php');  if(isset($_post['nickname'])){      $nickname = $_post['nickname'];      $st = $db->prepare("select * users nickname=?");      $st->bindparam(1, $nickname);     $st->execute();      if($st->rowcount() > 0) { echo 'nickname_exists';  } } if(isset($_post['email'])){      $email = $_post['email'];      $st = $db->prepare("select * users email=?");      $st->bindparam(1, $email);     $st->execute();      if($st->rowcount() > 0) { echo 'email_exists';  } } 

how fix this, , way how handle ajax php right way, can me hand.

i need make console.log

nickname_exists

email_exists

instead of

nickname_existsemail_exists

collect results array this:

require_once('db_connect.php'); //initalize array $result = array(     'nickname_exists' => 0,     'email_exists' => 0 ); if(isset($_post['nickname'])){     $nickname = $_post['nickname'];     $st = $db->prepare("select * users nickname=?");     $st->bindparam(1, $nickname);     $st->execute();     if($st->rowcount() > 0) {          $result['nickname_exists'] = 1;     } } if(isset($_post['email'])){     $email = $_post['email'];     $st = $db->prepare("select * users email=?");     $st->bindparam(1, $email);     $st->execute();     if($st->rowcount() > 0) {          $result['email_exists'] = 1;     } } //gives result in json. echo json_encode($result); 

then return json. after can check of them in javascript:

//initialize haserror var haserror = false; if (data.nickname_exists == 1) {     //set error nickname     nickname.addclass('error');     haserror = true; } if (data.email_exists == 1) {     //set error email     email.addclass('error');     haserror = true; } //if had no error: if (!haserror) {     registermsg.html(''); }