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SI14/archive/hotspots/2/guestbook/index.php

283 lines
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PHP
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<?php session_start(); ?>
<!DOCTYPE html>
<html dir="ltr">
<head>
<meta charset="utf-8">
<title>MAILBOX</title>
<script>
const titles = ["Mail", "Box", "💌"];
let i = 0;
setInterval(() => {
i = i % 3;
document.title = titles[i];
i++;
}, 1000);
</script>
<link href="style.css" rel="stylesheet">
<link rel="icon" type="image/png" href="ico.png">
</head>
<body>
<div id="toppy">What kind of resources do you see around you?</div>
<div id="sectop">What is the world made of where you are standing right now? What materials do you see? What does this do to you?</div>
<div class="img">
<div class="img1">🧱</div>
<div class="img2">💎</div>
<div class="img3">🧻</div>
<div class="img4">🛢</div>
<div class="img5">🔗</div>
<div class="img6">🗑</div>
<div class="img7">🥬</div>
<div class="img8">🍋</div>
<div class="img9">🐠</div>
<div class="img10">🐞</div>
<div class="img11">💧</div>
</div>
<div class="guestbook" id="guestbook">
<div class="guest-messages" id="guest-messages">
<?php
// ===================================================================
// PHP FLAT-FILE GUESTBOOK by Taufik Nurrohman <http://gplus.to/tovic>
// ===================================================================
// START CONFIGURATION
$database = 'database-001'; // Your TXT file name as database.
$per_page = 6; // The number of items you want to display per page.
$time_zone = 'Europe/Amsterdam'; // Look at `date_default_timezone_set()`
$max_length_name = 60; // Maximum character length for guest name
$max_length_message = 1000; // Maximum character length for guest message
$messages = array(
'database_missing' => 'Database not found. Created one. Please reload the page.',
'name_missing' => 'Please enter your name.',
'message_missing' => 'Please enter your message.',
'max_length_name' => 'Maximum character length for guest name is ' . $max_length_name,
'max_length_message' => 'Maximum character length for guest message is ' . $max_length_message,
'no_content' => 'No content.'
);
// END CONFIGURATION
// Set default timezone to adjust the timestamp.
// => http://www.php.net/manual/en/function.date-default-timezone-set.php
date_default_timezone_set($time_zone);
// Functions to create and/or update the content of the TXT file (our database)
function create_or_update_file($file_path, $data) {
$handle = fopen($file_path, 'w') or die('Cannot open file: ' . $file_path);
fwrite($handle, $data);
}
// Filter HTML outputs.
// The rest will appear as plain HTML entities to prevent XSS.
// => http://en.wikipedia.org/wiki/Cross-site_scripting
function filter_html($data) {
return preg_replace(
array(
'/&lt;(\/?)(b|blockquote|br|em|i|ins|mark|q|strong|u)&gt;/i', // Allowed HTML tags
'/&lt;center&gt;/', // Deprecated <center> tag
'/&lt;\/center&gt;/', // Deprecated </center> tag
'/&amp;([a-zA-Z]+|\#[0-9]+);/' // Symbols
),
array(
'<$1$2>',
'<div style="text-align:center;">',
'</div>',
'&$1;'
),
$data);
}
// Redefine database name via URL to load
// Load database-002.txt => http://localhost/guestbook/index.php&data=database-002
if(isset($_GET['data'])) {
$database = $_GET['data'];
}
// Check whether the "database" is not available. If not, create one!
if( ! file_exists($database . '.txt')) {
// Prevent guest to create new database via `data=database-XXX` in URL
// Only administrator can do this by editing the `$database` value
if( ! isset($_GET['data'])) {
create_or_update_file($database . '.txt', "");
echo "<p class=\"message-warning\">" . $messages['database_missing'] . "</p>";
}
return false;
} else {
$old_data = file_get_contents($database . '.txt');
}
/**
* Post a message
*/
$error = ""; // error messages
if($_SERVER['REQUEST_METHOD'] == 'POST') {
$name = "";
//$url = "";
$message = "";
$timestamp = date('U');
// Make sure the guest name is not empty.
if(isset($_POST['name']) && ! empty($_POST['name'])) {
$name = strip_tags($_POST['name']);
} else {
$error .= "<p class=\"message-error\">" . $messages['name_missing'] . "</p>";
}
// Make sure the guest message is not empty.
if(isset($_POST['message']) && ! empty($_POST['message'])) {
$message = preg_replace(
array(
'/[\n\r]{4,}/', // [1]
'/\n/',
'/[\r\t]/',
'/ {2}/', // Multiple space characters
'/ &nbsp;|&nbsp; /',
'/<a (.*?)?href=(\'|\")(.*?)(\'|\")(.*?)?>(.*?)<\/a>/i' // Match links
),
array(
'<br><br>',
'<br>',
'',
'&nbsp;&nbsp;',
'&nbsp;&nbsp;',
'$6' // Unlink all links in message content!
),
$_POST['message']);
$message = htmlentities($message, ENT_QUOTES, 'UTF-8'); // [2]
} else {
$error .= "<p class=\"message-error\">" . $messages['message_missing'] . "</p>";
}
// Check for character length limit
if(strlen($name) > $max_length_name) $error .= "<p class=\"message-error\">" . $messages['max_length_name'] . "</p>";
if(strlen($message) > $max_length_message) $error .= "<p class=\"message-error\">" . $messages['max_length_message'] . "</p>";
// If all data entered by guest is valid, insert new data!
if($error === "") {
$new_data = " 🌱 " . $name ." 🌱 " . "\n" . "\n" . $message . "\n" . $timestamp;
if( ! empty($old_data)) {
create_or_update_file($database . '.txt', $new_data . "\n\n==\n" . $old_data); // Prepend data
} else {
create_or_update_file($database . '.txt', $new_data); // Insert data
}
} else {
// else, print the error messages.
echo $error;
}
}
// [3]
$_SESSION['guest_name'] = isset($_POST['name']) ? $_POST['name'] : "";
$_SESSION['guest_message'] = isset($_POST['message']) && $error != "" ? htmlentities($_POST['message'], ENT_QUOTES, 'UTF-8') : "";
// ----------------------------------------------------------------------------------------
// [1]. Prevent guest to type too many line break symbols.
// People usually do these thing to make their SPAM messages looks striking.
// [2]. Convert all HTML tags into HTML entities. This is done thoroughly for safety.
// We can revert back the escaped HTML into normal HTML tags later via `filter_html()`
// [3]. Save the form data into session. So if something goes wrong, the data entered
// by guest will still be stored in the form after submitting.
// ----------------------------------------------------------------------------------------
/**
* Show the existing data.
*/
$data = file_get_contents($database . '.txt');
$current_page = isset($_GET['page']) ? $_GET['page'] : 1;
$nav = "";
if( ! empty($data)) {
$data = explode("\n\n==\n", $data);
$total_pages = ceil(count($data) / $per_page);
// Create navigation if the number of pages is more than 1.
if($total_pages > 1) {
for($i = 0; $i < $total_pages; $i++) {
if($current_page == ($i + 1)) {
$nav .= " <span>" . ($i + 1) . "</span>"; // Disabled navigation
} else {
$nav .= " <a href=\"?page=" . ($i + 1) . (isset($_GET['data']) ? '&amp;data=' . $database : '') . "\">" . ($i + 1) . "</a>";
}
}
}
for($i = 0; $i < count($data); $i++) {
$item = explode("\n", $data[$i]);
// Permalink (single item)
// http://localhost/guestbook/index.php&data=database-001&guest=0123456789
if(isset($_GET['guest']) && preg_match('/[0-9]+/', $_GET['guest'])) {
if($item[3] == $_GET['guest']) {
echo " <div class=\"guest-item\" id=\"guest-" . $item[3] . "\">\n";
echo " <strong class=\"guest-name\">";
echo $item[1] == "-" ? "" : "<a href=\"" . $item[1] . "\" rel=\"nofollow\" target=\"_blank\">";
echo $item[0];
echo $item[1] == "-" ? "" : "</a>";
echo "</strong>\n";
echo " <span class=\"guest-timestamp\">";
echo "<time datetime=\"" . date('c', $item[3]) . "\">" . date('Y/m/d H:i', $item[3]) . "</time>";
echo " <a href=\"?data=" . $database . "&amp;guest=" . $item[3] . "\" title=\"Permanent Link\">#</a>";
echo "</span>\n";
echo " <span class=\"guest-message\">" . filter_html($item[2]) . "</span>\n";
echo " </div>\n";
}
// Normal list
} else {
if($i <= ($per_page * $current_page) - 1 && $i > ($per_page * ($current_page - 1)) - 1) {
echo " <div class=\"guest-item\" id=\"guest-" . $item[3] . "\">\n";
echo " <strong class=\"guest-name\">";
echo $item[1] == "-" ? "" : "<a href=\"" . $item[1] . "\" rel=\"nofollow\" target=\"_blank\">";
echo $item[0];
echo $item[1] == "-" ? "" : "</a>";
echo "</strong>\n";
echo " <span class=\"guest-timestamp\">";
echo "<time datetime=\"" . date('c', $item[3]) . "\">" . date('Y/m/d H:i', $item[3]) . "</time>";
echo " <a href=\"?data=" . $database . "&amp;guest=" . $item[3] . "\" title=\"Permanent Link\">#</a>";
echo "</span>\n";
echo " <span class=\"guest-message\">" . filter_html($item[2]) . "</span>\n";
echo " </div>\n";
}
}
}
} else {
echo " <div class=\"guest-item\">\n";
echo " <strong class=\"guest-name\">Guestbook</strong>\n";
echo " <span class=\"guest-message\">" . $messages['no_content'] . "</span>\n";
echo " </div>\n";
}
?>
</div>
<div class="guestbook-nav"><?php echo trim($nav); ?></div>
<?php if( ! isset($_GET['data']) && ! isset($_GET['guest'])): ?>
<form method="post">
<label>Name</label>
<div><input type="text" name="name" value="<?php echo isset($_SESSION['guest_name']) ? $_SESSION['guest_name'] : ''; ?>"></div>
<div><input style="display: none" type="text" name="url" value="<?php echo isset($_SESSION['guest_url']) ? $_SESSION['guest_url'] : 'http://'; ?>"></div>
<label>Message</label>
<div><textarea name="message" placeholder="What is the world made of around you?"><?php echo isset($_SESSION['guest_message']) ? $_SESSION['guest_message'] : ''; ?></textarea></div>
<hr>
<div style="display: none"><?php echo $math; ?> = <input style="display: none" type="text" name="math" autocomplete="off"> </div><div><button type="submit">Leave a trace</button></div>
<span class="clear"></span>
</form>
<?php endif; ?>
</div>
</body>
</html>
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