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<?php
// Function to sanitize user input
function sanitize_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
// Check if form has been submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
// Get form data
$name = sanitize_input($_POST["name"]);
$message = sanitize_input($_POST["message"]);
// Validate form data
$errors = [];
if (empty($name)) {
$errors[] = "Name is required";
}
if (empty($message)) {
$errors[] = "Message is required";
}
// If no errors, add entry to guestbook
if (empty($errors)) {
$entry = $name . "|" . $message . "\n";
file_put_contents("entries.txt", $entry, FILE_APPEND | LOCK_EX);
}
}
// Display guestbook entries
$entries = file("entries.txt");
?>
<!DOCTYPE html>
<html>
<head>
<title>Guestbook</title>
<style>
body {
background-color: black;
color: white;
font-family: Arial, sans-serif;
font-size: 16px;
}
form {
display: flex;
flex-direction: column;
margin-bottom: 20px;
}
label {
margin-bottom: 10px;
}
input, textarea {
font-family: Arial, sans-serif;
font-size: 16px;
padding: 5px;
margin-bottom: 10px;
border-radius: 3px;
border: none;
}
textarea {
height: 100px;
}
input[type="submit"] {
background-color: white;
color: black;
font-weight: bold;
border-radius: 3px;
border: none;
padding: 10px;
cursor: pointer;
}
.entry {
margin-bottom: 20px;
}
.entry h3 {
font-size: 18px;
margin-bottom: 10px;
}
.entry p {
font-size: 16px;
margin-bottom: 10px;
}
.entry a {
color: red;
margin-left: 10px;
}
</style>
</head>
<body>
<h1>Guestbook</h1>
<?php
// If there are errors, display them
if (!empty($errors)) {
echo "<ul>";
foreach ($errors as $error) {
echo "<li>" . $error . "</li>";
}
echo "</ul>";
}
?>
<form method="post">
<label for="name">Name:</label>
<input type="text" id="name" name="name">
<label for="message">Message:</label>
<textarea id="message" name="message"></textarea>
<input type="submit" value="Submit">
</form>
<h2>Entries:</h2>
<?php
foreach ($entries as $entry) {
list($name, $message) = explode("|", $entry);
echo "<div class='entry'>";
echo "<h3>" . htmlspecialchars($name) . "</h3>";
echo "<p>" . htmlspecialchars($message) . "</p>";
echo "</div>";
}
?>
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