mysql - Saving Class to Database in Object Oriented PHP -

i'm new object oriented programming , don't know if i'm doing right. want take data form submitted , add database. database credentials correct.

<?php   require_once('../layout.php'); require_once('../dbconnect.php');  class student{     public $f_name;     public $l_name;     public $email;     public $state;     public $phone;     public $birthday;     public function __construct($f_name,$l_name,$email,$state,$phone,$birthday) {         $f_name  = $_post['f_name'];         $l_name  = $_post['l_name'];         $email = $_post['email'];         $state  = $_post['state'];         $phone = $_post['phone'];         $birthday = $_post['birthday'];         $query = 'insert `student`(`first_name`, `last_name`, `email`, `state`, `phone`, `birthday`) values ($f_name,$l_name,$email,$state,$phone,$birthday)';         $resultquery = mysqli_query($dbconnect,$query);         if($resultquery) {             echo "<div class='alert alert-success'>dsf</div>";         }     } }    ?>    <form method="post" class="col-md-6 col-md-offset-3">         <input name="f_name" class="form-control">         <input name="l_name" class="form-control">         <input name="email" class="form-control">         <input name="state" class="form-control">         <input name="phone" class="form-control">         <input name="birthday" class="form-control" type="date">         <input name="submit" type="submit" class="btn btn-default"> </form> 

you don't have pass params, because you're declaring them in __construct well. remove them __construct. without these params can this:

if(!empty($_post['submit'])) { new student(); }

you can add piece below class declaration , catch post.

your class (in opinion) become like:

<?php   class student{      public function __construct() {         $f_name  = $_post['f_name'];         $l_name  = $_post['l_name'];         $email = $_post['email'];         $state  = $_post['state'];         $phone = $_post['phone'];         $birthday = $_post['birthday'];         $query = 'insert student(`first_name`, `last_name`, `email`, `state`, `phone`, `birthday`) values ($f_name,$l_name,$email,$state,$phone,$birthday)';         $resultquery = mysqli_query($dbconnect,$query);         if($resultquery) {             echo "<div class='alert alert-success'>dsf</div>";         }     } }