144 lines
5.5 KiB
PHP
144 lines
5.5 KiB
PHP
<?php
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// Set headers to prevent search engines from indexing the page
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header("X-Robots-Tag: noindex, nofollow", true);
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// Start session for CSRF token
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session_start();
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// Generate a CSRF token if one isn't set
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if (empty($_SESSION['csrf_token'])) {
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$_SESSION['csrf_token'] = bin2hex(random_bytes(32));
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}
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// Function to process input data
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function processInput($input) {
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// Ignore blank lines
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if (trim($input) === '') {
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return null;
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}
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// Step 1: Remove any non-numeric characters
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$cleanedInput = preg_replace('/\D+/', '', $input);
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// Step 2: Filter only 17 digits long strings
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if (preg_match('/^\d{17}$/', $cleanedInput)) {
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// Step 3: Check if the first four digits are within 2006-2025
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$firstFourDigits = substr($cleanedInput, 0, 4);
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if ($firstFourDigits >= 2006 && $firstFourDigits <= 2025) {
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return ['valid' => $cleanedInput];
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} else {
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return ['invalid' => $cleanedInput, 'reason' => 'First four digits are not within 2006-2025'];
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}
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} else {
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return ['invalid' => $cleanedInput, 'reason' => 'Not 17 digits long'];
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}
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}
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$validResults = [];
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$invalidResults = [];
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$error = null;
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// Validate the request method and CSRF token
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if ($_SERVER['REQUEST_METHOD'] === 'POST') {
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if (!isset($_POST['csrf_token']) || $_POST['csrf_token'] !== $_SESSION['csrf_token']) {
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$error = "Invalid CSRF token.";
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} else {
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$inputData = filter_input(INPUT_POST, 'input_data', FILTER_SANITIZE_STRING);
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$rows = explode("\n", trim($inputData));
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foreach ($rows as $row) {
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$result = processInput($row);
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if ($result && isset($result['valid'])) {
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$validResults[] = $result['valid'];
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} elseif ($result) {
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$invalidResults[] = $result;
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}
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}
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// Remove duplicate valid results
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$validResults = array_unique($validResults);
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}
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}
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// Function to create a downloadable file link
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function createDownloadLink($filename, $data) {
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$filepath = sys_get_temp_dir() . '/' . $filename;
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file_put_contents($filepath, implode("\n", $data));
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return $filepath;
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}
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// Handle the download of valid results
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if (isset($_POST['download_valid']) && $_POST['csrf_token'] === $_SESSION['csrf_token']) {
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$filepath = createDownloadLink('valid_results.txt', $validResults);
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header('Content-Type: application/octet-stream');
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header('Content-Disposition: attachment; filename="valid_results.txt"');
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readfile($filepath);
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exit;
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}
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// Handle the download of invalid results
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if (isset($_POST['download_invalid']) && $_POST['csrf_token'] === $_SESSION['csrf_token']) {
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$invalidOutput = array_map(function ($item) {
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return $item['invalid'] . " - " . $item['reason'];
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}, $invalidResults);
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$filepath = createDownloadLink('invalid_results.txt', $invalidOutput);
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header('Content-Type: application/octet-stream');
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header('Content-Disposition: attachment; filename="invalid_results.txt"');
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readfile($filepath);
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exit;
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}
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?>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="robots" content="noindex, nofollow">
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<title>Input Validator</title>
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<link rel="stylesheet" href="style.css">
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</head>
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<body>
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<div class="container">
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<h1>Input Validator</h1>
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<?php if ($error): ?>
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<div class="error"><?= htmlspecialchars($error) ?></div>
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<?php endif; ?>
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<form method="post">
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<label for="input_data">Enter your data (one per line):</label><br>
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<textarea id="input_data" name="input_data" rows="10" cols="50"><?= isset($_POST['input_data']) ? htmlspecialchars($_POST['input_data']) : '' ?></textarea><br><br>
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<input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
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<button type="submit" class="btn">Process</button>
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</form>
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<?php if ($_SERVER['REQUEST_METHOD'] === 'POST' && !$error): ?>
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<div class="results">
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<h2>Results</h2>
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<p>Input Rows: <strong><?= count($rows) ?></strong></p>
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<p>Valid Output Rows (Unique): <strong><?= count($validResults) ?></strong></p>
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<p>Invalid/Discarded Rows: <strong><?= count($invalidResults) ?></strong></p>
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<?php if (count($invalidResults) > 0): ?>
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<h3 class="error-title">Discarded Inputs:</h3>
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<ul class="error-list">
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<?php foreach ($invalidResults as $invalid): ?>
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<li class="error-item"><?= htmlspecialchars($invalid['invalid']) ?> - <?= htmlspecialchars($invalid['reason']) ?></li>
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<?php endforeach; ?>
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</ul>
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<?php endif; ?>
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<form method="post" class="download-buttons">
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<input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
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<input type="hidden" name="input_data" value="<?= htmlspecialchars($_POST['input_data']) ?>">
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<?php if (count($validResults) > 0): ?>
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<button type="submit" name="download_valid" class="btn">Download Valid Results</button>
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<?php endif; ?>
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<?php if (count($invalidResults) > 0): ?>
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<button type="submit" name="download_invalid" class="btn btn-error">Download Invalid Results</button>
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<?php endif; ?>
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</form>
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</div>
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<?php endif; ?>
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</div>
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</body>
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</html>
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