code-boxx/0-PHP-LOGIN-NO-DB.MD

## 0-PHP-LOGIN-NO-DB.MD

      
    Raw
  

              0-PHP-LOGIN-NO-DB.MD
            
          
    PHP USER LOGIN WITHOUT DATABASE

https://code-boxx.com/simple-php-login-without-database/
NOTES


Set your own users and passwords in $users of 2-check.php, also where to redirect on successful login.
Protect all your pages by including 3-protect.php at the top.
Launch 1-login.php in the web browser, that's all.

LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1-login.css
/* (A) WHOLE PAGE */
* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}
body {
  max-width: 500px;
  margin: 0 auto;
  padding: 20px;
  background: #f7f7f7;
}

/* (B) LOGIN FORM */
#login-form {
  padding: 20px;
  border: 1px solid #ebebeb;
  background: #fff;
}
#login-form h1 {
  font-size: 1.5em;
  margin: 0 0 20px 0;
}
#login-form label, #login-form input {
  display: block;
  width: 100%;
  margin-top: 10px;
}
#login-form label { color: #767676; }
#login-form input {
  padding: 10px;
  border: 1px solid #adadad;
}
#login-form input[type=submit] {
  margin-top: 20px;
  border: 0;
  color: #fff;
  background: #a52323;
  cursor: pointer;
}

/* (C) INVALID LOGIN */
#login-bad {
  padding : 10px;
  margin-bottom: 20px;
  background: #ffe7e7;
  border: 1px solid #ff3e3e;
  color: #c10000;
  font-weight: bold;
}

## 1-login.php
<?php
// (A) LOGIN CHECKS
require "2-check.php";

// (B) LOGIN PAGE HTML ?>
<!DOCTYPE html>
<html>
  <head>
    <title>Login Page Demo</title>
    <link href="1-login.css" rel="stylesheet">
  </head>
  <body>
    <?php if (isset($failed)) { ?>
    <div id="login-bad">Invalid email or password.</div>
    <?php } ?>

    <form id="login-form" method="post" target="_self">
      <h1>PLEASE SIGN IN</h1>
      <label for="user">User</label>
      <input type="text" name="user" required>
      <label for="password">Password</label>
      <input type="password" name="password" required>
      <input type="submit" value="Sign In">
    </form>
  </body>
</html>

## 2-check.php
<?php
// (A) START SESSION
session_start();

// (B) PROCESS LOGIN
if (isset($_POST["user"]) && !isset($_SESSION["user"])) {
  // (B1) USERS & PASSWORDS - SET YOUR OWN !
  $users = [
    "joe" => "123456",
    "jon" => "654321",
    "joy" => "987654"
  ];

  // (B2) CHECK & VERIFY
  if (isset($users[$_POST["user"]]) && $users[$_POST["user"]] == $_POST["password"]) {
    $_SESSION["user"] = $_POST["user"];
  }

  // (B3) FAILED LOGIN FLAG
  if (!isset($_SESSION["user"])) { $failed = true; }
}

// (C) REDIRECT TO HOME PAGE IF SIGNED IN - SET YOUR OWN !
if (isset($_SESSION["user"])) {
  header("Location: 4-dummy.php");
  exit();
}

## 3-protect.php
<?php
// (A) START SESSION
session_start();

// (B) LOGOUT REQUEST
if (isset($_POST["logout"])) {
  session_destroy();
  unset($_SESSION);
}

// (C) REDIRECT TO LOGIN PAGE IF NOT SIGNED IN
if (!isset($_SESSION["user"])) {
  header("Location: 1-login.php");
  exit();
}

## 4-dummy.php
<?php
// (A) THIS IS A PROTECTED DUMMY PAGE
require "3-protect.php";

// (B) HTML AS USUAL ?>
<!DOCTYPE html>
<html>
  <head>
    <title>Demo Page</title>
  </head>
  <body>
    <!-- (B1) LOGOUT FORM -->
    <form method="post">
      <input type="hidden" name="logout" value="1">
      <input type="submit" value="Sign Out">
    </form>

    <!-- (B2) WHO IS THE CURRENT USER? -->
    <?=$_SESSION["user"]?>
  </body>
</html>
	/* (A) WHOLE PAGE */
	* {
	font-family: Arial, Helvetica, sans-serif;
	box-sizing: border-box;
	}
	body {
	max-width: 500px;
	margin: 0 auto;
	padding: 20px;
	background: #f7f7f7;
	}

	/* (B) LOGIN FORM */
	#login-form {
	padding: 20px;
	border: 1px solid #ebebeb;
	background: #fff;
	}
	#login-form h1 {
	font-size: 1.5em;
	margin: 0 0 20px 0;
	}
	#login-form label, #login-form input {
	display: block;
	width: 100%;
	margin-top: 10px;
	}
	#login-form label { color: #767676; }
	#login-form input {
	padding: 10px;
	border: 1px solid #adadad;
	}
	#login-form input[type=submit] {
	margin-top: 20px;
	border: 0;
	color: #fff;
	background: #a52323;
	cursor: pointer;
	}

	/* (C) INVALID LOGIN */
	#login-bad {
	padding : 10px;
	margin-bottom: 20px;
	background: #ffe7e7;
	border: 1px solid #ff3e3e;
	color: #c10000;
	font-weight: bold;
	}
	<?php
	// (A) LOGIN CHECKS
	require "2-check.php";

	// (B) LOGIN PAGE HTML ?>
	<!DOCTYPE html>
	<html>
	<head>
	<title>Login Page Demo</title>
	<link href="1-login.css" rel="stylesheet">
	</head>
	<body>
	<?php if (isset($failed)) { ?>
	<div id="login-bad">Invalid email or password.</div>
	<?php } ?>

	<form id="login-form" method="post" target="_self">
	<h1>PLEASE SIGN IN</h1>
	<label for="user">User</label>
	<input type="text" name="user" required>
	<label for="password">Password</label>
	<input type="password" name="password" required>
	<input type="submit" value="Sign In">
	</form>
	</body>
	</html>
	<?php
	// (A) START SESSION
	session_start();

	// (B) PROCESS LOGIN
	if (isset($_POST["user"]) && !isset($_SESSION["user"])) {
	// (B1) USERS & PASSWORDS - SET YOUR OWN !
	$users = [
	"joe" => "123456",
	"jon" => "654321",
	"joy" => "987654"
	];

	// (B2) CHECK & VERIFY
	if (isset($users[$_POST["user"]]) && $users[$_POST["user"]] == $_POST["password"]) {
	$_SESSION["user"] = $_POST["user"];
	}

	// (B3) FAILED LOGIN FLAG
	if (!isset($_SESSION["user"])) { $failed = true; }
	}

	// (C) REDIRECT TO HOME PAGE IF SIGNED IN - SET YOUR OWN !
	if (isset($_SESSION["user"])) {
	header("Location: 4-dummy.php");
	exit();
	}
	<?php
	// (A) THIS IS A PROTECTED DUMMY PAGE
	require "3-protect.php";

	// (B) HTML AS USUAL ?>
	<!DOCTYPE html>
	<html>
	<head>
	<title>Demo Page</title>
	</head>
	<body>
	<!-- (B1) LOGOUT FORM -->
	<form method="post">
	<input type="hidden" name="logout" value="1">
	<input type="submit" value="Sign Out">
	</form>

	<!-- (B2) WHO IS THE CURRENT USER? -->
	<?=$_SESSION["user"]?>
	</body>
	</html>