A “CMS” for a one-page site? [closed]

Answer 1

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): ?>
    

        '.$loginerror.'
'; ?>
        
        
        
    

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');
    ?>
    Logout
    

        <?php echo $contents; ?>
        
    

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.