chengdulittlea
/
LaMDWikiV4


			
				
					
						
						
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							<?php
// Set the file path where the blog posts will be stored
$file_path = 'posts.txt';

// Set the page title
$page_title = 'My PHP Blog';

// Start the user session
session_start();

// Check if the user is logged in
if (!isset($_SESSION['username'])) {
  // If not, check if the login form was submitted
  if (isset($_POST['login'])) {
    // Get the username and password from the form
    $username = trim($_POST['username']);
    $password = trim($_POST['password']);

    // Validate the input
    if ($username == 'admin' && $password == 'password') {
      // If the username and password are correct, set the session variable and redirect to the blog page
      $_SESSION['username'] = $username;
      header('Location: blog.php');
      exit;
    } else {
      // If the username and password are incorrect, display an error message
      $error = 'Incorrect username or password.';
    }
  }

  // Display the login page
  echo "<html><head><title>$page_title - Login</title></head><body>";
  echo "<h1>$page_title</h1>";
  if (isset($error)) { echo "<p>$error</p>"; }
  echo '<form method="post">';
  echo '<label>Username:</label><br>';
  echo '<input type="text" name="username"><br>';
  echo '<label>Password:</label><br>';
  echo '<input type="password" name="password"><br>';
  echo '<input type="submit" name="login" value="Login">';
  echo '</form>';
  echo '</body></html>';
  exit;
}

// Display the blog page
echo "<html><head><title>$page_title</title></head><body>";
echo "<h1>$page_title</h1>";

// Check if the form was submitted
if (isset($_POST['submit'])) {
  // Get the post title and content from the form
  $title = trim($_POST['title']);
  $content = trim($_POST['content']);

  // Validate the input
  if (strlen($title) == 0) {
    $error = 'Please enter a post title.';
  } else if (strlen($content) == 0) {
    $error = 'Please enter post content.';
  } else {
    // Format the post data as a string to be saved to the file
    $post = "=== $title ===\n$content\n";

    // Open the file in append mode and write the post data
    $fh = fopen($file_path, 'a');
    fwrite($fh, $post);
    fclose($fh);
  }
}

// Open the file and read the posts
$fh = fopen($file_path, 'r');
$posts = '';
while (!feof($fh)) {
  // Read each line of the file and append it to the posts string
  $line = fgets($fh);
  $posts .= $line;
}
fclose($fh);

// Display the blog posts on the page
echo $posts;

// Display the new post form
echo '<h2>New Post</h2>';
if (isset($error)) { echo "<p>$error</p>"; }
echo '<form method="post">';
echo '<label>Title:</label><br>';
echo '<input type="text" name="title" value="';
if (isset($title)) { echo htmlspecialchars($title); }
echo '"><br>';
echo '<label>Content:</label><br>';
echo '<textarea name="content">';
if (isset($content)) { echo htmlspecialchars($content); }
echo '</textarea><br>';
echo '<input type="submit" name="submit" value="Submit">';
echo '</form>';

// Display the HTML footer
echo '</body></html>';
?>