It shouldn't be a large job to code this from scratch. All you need is admin.php with some kind of authentication and one form. I timed myself and made this in 7 minutes:
Login and logout
if(isset($_GET['login'])) {
// Check user credentials from db or hardcoded variables
if($_POST['username'] == 'user123' && $_POST['password'] == 'pass123') {
$_SESSION['logged'] = true;
} else {
$loginerror = 'Invalid credentials';
}
}
if(isset($_GET['logout'])) {
$_SESSION = array();
session_destroy();
}
Login form
if(!isset($_SESSION['logged']) || $_SESSION['logged'] !== true): ?>
<form method="post" action="admin.php?login">
<?php if(isset($loginerror)) echo '<p>'.$loginerror.'</p>'; ?>
<input type="username" name="username" value="<?php isset($_POST['username']) echo $_POST['username']; ?>" />
<input type="password" name="password" />
<input type="submit" value="Login" />
</form>
<?php endif;
Actual admin area
if(isset($_SESSION['logged']) && $_SESSION['logged'] === true):
// Save contents
if(isset($_GET['save'])) {
file_put_contents('contents.txt', $_POST['contents']);
}
// Get contents from db or file
$contents = file_get_contents('contents.txt');
?>
<a href="admin.php?logout">Logout</a>
<form method="post" action="admin.php?save">
<textarea name="contents"><?php echo $contents; ?></textarea>
<input type="submit" value="Save" />
</form>
<?php endif;
Just combine those segments to get the full code. This code snippet has authentication, logout functionality and saves the contents of a textarea in a file. Alternatively you could change this so that users and content resides in database.
Personally, it would have taken longer for me to find an appropriate lightweight CMS and configure it to work.
