php - Call to undefined function session_register() -


this question has answer here:

please me !!

why can't login , , error : *fatal error: call undefined function session_register() in c:\xampp\htdocs**\proses1.php on line 27*

this proses1.php code :

<?php include "connect.php";    $username= $_post['username'];    $password= $_post['password'];     if (!$_post['username'] | !$_post['password'])  {     print "<script>alert('isi username dan password anda!');     javascript:history.go(-1);</script>";     exit;  }  $username = stripslashes($username);  $password = stripslashes($password);  $username = mysql_real_escape_string($username);  $password = mysql_real_escape_string($password);  $sql="select login.username, login.password, login.status login          login.username='$username' , login.password='$password'";  $result=mysql_query($sql) or die(mysql_error());  $count=mysql_num_rows($result);  // if result matched $myusername , $mypassword, table row must 1 row  $r=mysql_fetch_array($result);   session_start();  session_register("username");  session_register("password");  session_register("status");  //session_register("nojual");  $_session['username']=$r[username];  $_session['password']=$r[password];  $_session['status']=$r[status];  //$_session['nojual']=$r[nojual]; //$_session['nojual']=$r[nojual];         if ($_session['status']=='dokter') // ini untuk admin            {            header("location:home_dokter.php");        }else if($_session['status']=='apotik'){            header("location:uji.php");        }else if($_session['status']=='bagian persediaan'){           header("location:obat.php");         }else{       print "<script>alert('anda salah login!');     javascript:history.go(-1);</script>";     exit;    }   ?>

the function no longer present in php 5.4 instead use 

$_session['myusername']="something";

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