mysql - Validation of password and confirm password in PHP Error shows all the time -

so trying create login form , @ part when want validate password , confirm password. code used (you can find below) shows me everytime submit register button "the password , confirm password not match" thought enter same password. idea should changed in code remove error?

<?php session_start();   include('includes/config.php'); include('includes/db.php');  function isunique($email){ $query="select * users email ='$email'"; global $db;   $result = $db->query($query);  if($result->num_rows>0){ return false; } else return true; }  if(isset($_post['register'])) { $_session['name']=$_post ['name']; $_session['email']=$_post ['email']; $_session['password']=$_post ['password']; $_session['confirm_password']=$_post ['confirm_password'];  if(strlen($_post['name'])<3){ header("location:register.php?err=".urlencode ("the name must @ least 3   characters long")); exit(); }  else if(strlen($_post['password']) < 5 ){   header("location:register.php?err=".urlencode ("the password should @  least 5 characters")); exit(); }  else if(strlen($_post['confirm_password']) < 5 ){   header("location:register.php?err=".urlencode ("the confirm password     should @ least 5 characters")); exit(); }  else if(!isunique($_post['email'])){   header("location:register.php?err=".urlencode ("email in use.   please use one")); exit(); } else if($_post['[password'] != $_post['confirm_password']) {      header("location:register.php?err=".urlencode ("the password , confirm           password not match"));     exit();     }      }     ?> 

and here other part put condition when error msg should displayed.

`<form action="register.php" method="post" style="margin-top:35px;">   <h2> register here </h2>    <?php   if(isset ($_get['err']))  { ?>    <div class="alert alert-danger"><?php echo $_get['err']; ?></div>   <?php }    ?>` 

you had little typo:

instead of $_post['[password'] use $_post['password']