Online PHP editor | perf for PQadj

<?php session_start(); require "config.php"; //Check to see if the user is logged in. if(isset($_SESSION['username'])){ header("location: members.php"); } //Check to see if the user click the button if(isset($_POST['submit'])) { $user=$_POST['user']; $pass=$_POST['pass']; //Prevent MySQL Injections $user = stripslashes($user); $pass = stripslashes($pass); $user = mysqli_real_escape_string($con, $user); $pass = mysqli_real_escape_string($con, $pass); //Check to see if the user left any space empty! if($user == "" || $pass == "") { echo "Please fill in all the information!"; } //Check to see if the username AND password MATCHES the username AND password in the DB else { $query = mysqli_query($con,"SELECT * FROM members WHERE username = '$user' and password = '$pass'") or die("Can not query DB."); $count = mysqli_num_rows($query); if ($count == 1) { $_SESSION['username']=$user; //Create a session for the user! header ("location: members.php"); } else{ echo "Username and Password DO NOT MATCH! TRY AGAIN!"; } } } ?> <html> <table width="300" align="center" cellpadding="0" cellspacing="1" border="1px solid black"> <tr> <form name="register" method="POST" action="login.php"> <td> <table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFFF"> <tr> <td colspan="3"><strong><center>Login </center></strong></td> </tr> <tr> <td width="78">Username</td> <td width="6">:</td> <td width="294"><input name="user" type="text" id="user"></td> </tr> <tr> <td>Password</td> <td>:</td> <td><input name="pass" type="password" id="pass"></td> </tr> <tr> <td></td> <td></td> <td><input type="submit" name="submit" value="Login"></td> </tr> </table> </td> </form> </tr> </table> </html>

Version	System time (s)	User time (s)	Memory (MiB)
5.4.20	0.008	0.040	12.39
5.4.19	0.015	0.045	12.36
5.4.18	0.017	0.043	12.36
5.4.17	0.015	0.044	12.38
5.4.16	0.017	0.044	12.36
5.4.15	0.012	0.047	12.36
5.4.14	0.023	0.055	12.06
5.4.13	0.018	0.042	12.03
5.4.12	0.015	0.042	12.00
5.4.11	0.016	0.040	12.00
5.4.10	0.018	0.041	12.00
5.4.9	0.018	0.042	12.00
5.4.8	0.016	0.042	12.00
5.4.7	0.015	0.042	12.00
5.4.6	0.016	0.041	12.00
5.4.5	0.017	0.062	12.00
5.4.4	0.016	0.042	11.98
5.4.3	0.016	0.043	11.98
5.4.2	0.023	0.056	11.97
5.4.1	0.014	0.044	11.98
5.4.0	0.016	0.042	11.47
5.3.27	0.022	0.061	12.72
5.3.26	0.020	0.052	12.72
5.3.25	0.017	0.045	12.72
5.3.24	0.021	0.060	12.72
5.3.23	0.016	0.046	12.70
5.3.22	0.017	0.043	12.68
5.3.21	0.015	0.047	12.68
5.3.20	0.023	0.051	12.68
5.3.19	0.016	0.045	12.68
5.3.18	0.018	0.042	12.68
5.3.17	0.024	0.066	12.67
5.3.16	0.017	0.046	12.67
5.3.15	0.020	0.041	12.67
5.3.14	0.017	0.047	12.66
5.3.13	0.017	0.048	12.66
5.3.12	0.018	0.046	12.66
5.3.11	0.016	0.046	12.66
5.3.10	0.013	0.049	12.12
5.3.9	0.016	0.045	12.08
5.3.8	0.015	0.046	12.08
5.3.7	0.015	0.047	12.08
5.3.6	0.019	0.043	12.06
5.3.5	0.017	0.053	12.00
5.3.4	0.024	0.058	12.00
5.3.3	0.017	0.042	11.94
5.3.2	0.016	0.043	11.71
5.3.1	0.018	0.039	11.68
5.3.0	0.017	0.041	11.66