php - Variables wont insert into table ~ mysqli -


i'm posting form in html php.

i have connect.php connects database: 

<?php     $db = mysqli_connect('localhost','adam','password','easyfix', '3306');     if(mysqli_connect_errno()){         echo "failed connect mysql: " . mysqli_connect_error();     } ?>

i have register.php want insert variables html form.

<?php     require 'connect.php';     $username = $_post["username"];     $email = $_post["email"];     $password = $_post["password"];     $cpassword = $_post["cpassword"];      //echo $username;     //echo $email;     //echo $password;     //echo $cpassword;      mysqli_query($db,"insert users (username, email, password)     values ('". $username ."', '". $email ."', '". $password ."')");     or die(mysqli_error($db));      $mysqli->close($db); ?>

i've used echos make sure data posted, has. when comment out mysqli_query, echos displayed. when leave code is, echos not displayed , white page nothing inserted database.

i know should use prepared statements, wish data inserted before that.

i've checked out few similar answers on here have not found 1 work. variables not concatenated, thought fix issue nope.

here form:

<form action="../php/registration.php" method="post" name="login_form" class="form-signin" > <h3 class="form-signin-heading">register account!</h3> <hr class="colorgraph"> <br> <h4> username:</h4> <input type="text" class="form-control" name="username" placeholder="username" required="" autofocus="" /> </br> <h4> email:</h4> <input type="text" class="form-control" name="email" placeholder="email" required="" autofocus="" /> </br>              <h4> password:</h4> <input type="password" class="form-control" name="password" placeholder="password" required=""/>               </br>  <h4> re-enter password</h4>            <input type="password" class="form-control" name="cpassword" placeholder="password" required=""/> </br> <div class="btn-toobar"> <button type="submit" class="btn btn-primary">submit</button>            </div> </form>

password mysql reserved word , therefore should used backticks `:

insert users (username, email, `password`) ....

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