189 lines
9.0 KiB
PHP
189 lines
9.0 KiB
PHP
<?php
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function analyze_seo($html) {
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$results = [
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'title' => ['text' => '', 'length' => 0, 'status' => 'danger'],
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'description' => ['text' => '', 'length' => 0, 'status' => 'danger'],
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'h1_count' => ['count' => 0, 'status' => 'danger'],
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'alt_tags' => ['missing' => 0, 'total' => 0, 'status' => 'success'],
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'og_tags' => ['found' => 0, 'status' => 'warning'],
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];
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if (empty($html)) return $results;
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$doc = new DOMDocument();
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@$doc->loadHTML($html);
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// Title
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$title_node = $doc->getElementsByTagName('title')->item(0);
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if ($title_node) {
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$results['title']['text'] = trim($title_node->nodeValue);
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$results['title']['length'] = strlen($results['title']['text']);
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if ($results['title']['length'] >= 10 && $results['title']['length'] <= 70) {
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$results['title']['status'] = 'success';
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}
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}
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// Meta Description
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$metas = $doc->getElementsByTagName('meta');
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foreach ($metas as $meta) {
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$name = strtolower($meta->getAttribute('name'));
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$property = strtolower($meta->getAttribute('property'));
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if ($name == 'description') {
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$results['description']['text'] = trim($meta->getAttribute('content'));
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$results['description']['length'] = strlen($results['description']['text']);
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if ($results['description']['length'] >= 50 && $results['description']['length'] <= 160) {
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$results['description']['status'] = 'success';
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}
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}
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if (strpos($property, 'og:') === 0) {
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$results['og_tags']['found']++;
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}
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}
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if ($results['og_tags']['found'] >= 3) { // og:title, og:description, og:image
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$results['og_tags']['status'] = 'success';
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}
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// H1 Count
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$h1s = $doc->getElementsByTagName('h1');
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$results['h1_count']['count'] = $h1s->length;
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if ($results['h1_count']['count'] === 1) {
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$results['h1_count']['status'] = 'success';
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}
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// Alt Tags
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$images = $doc->getElementsByTagName('img');
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$results['alt_tags']['total'] = $images->length;
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foreach ($images as $img) {
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if (!$img->hasAttribute('alt') || trim($img->getAttribute('alt')) == '') {
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$results['alt_tags']['missing']++;
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}
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}
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if ($results['alt_tags']['total'] > 0 && $results['alt_tags']['missing'] > 0) {
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$results['alt_tags']['status'] = 'warning';
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}
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return $results;
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}
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$url_input = '';
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$seo_results = null;
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$error_message = '';
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if ($_SERVER["REQUEST_METHOD"] == "POST" && isset($_POST['url'])) {
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$url_input = trim($_POST['url']);
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if (filter_var($url_input, FILTER_VALIDATE_URL)) {
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$context = stream_context_create([
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'http' => [
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'timeout' => 10, // 10 seconds
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'user_agent' => 'FlatlogicSEOChecker/1.0',
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]
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]);
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$html = @file_get_contents($url_input, false, $context);
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if ($html) {
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$seo_results = analyze_seo($html);
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} else {
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$error_message = "Could not retrieve content from the URL. Please check if the URL is correct and publicly accessible.";
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}
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} else {
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$error_message = "Invalid URL provided. Please enter a valid URL (e.g., http://example.com).";
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}
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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="viewport" content="width=device-width, initial-scale=1.0">
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<title>SEO Checker - LAMP Demo</title>
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<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet">
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<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css">
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<link rel="stylesheet" href="assets/css/custom.css">
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</head>
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<body class="bg-light">
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<nav class="navbar navbar-expand-lg navbar-light bg-white shadow-sm">
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<div class="container">
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<a class="navbar-brand" href="index.php">
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<i class="bi bi-lightbulb-fill text-primary"></i>
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LAMP Demo
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</a>
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<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav">
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<span class="navbar-toggler-icon"></span>
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</button>
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<div class="collapse navbar-collapse" id="navbarNav">
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<ul class="navbar-nav ms-auto">
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<li class="nav-item"><a class="nav-link" href="index.php">Home</a></li>
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<li class="nav-item"><a class="nav-link" href="vibe.php">Vibe</a></li>
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<li class="nav-item"><a class="nav-link" href="sandbox.php">Sandbox</a></li>
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<li class="nav-item"><a class="nav-link active" href="seo.php">SEO</a></li>
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<li class="nav-item"><a class="nav-link" href="admin.php">Admin</a></li>
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<li class="nav-item"><a class="nav-link" href="contact.php">Contact</a></li>
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</ul>
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</div>
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</div>
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</nav>
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<main class="container my-5">
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<div class="text-center mb-5">
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<h1 class="display-5">Live SEO Checker</h1>
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<p class="lead">Enter a URL to get an on-page SEO analysis.</p>
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</div>
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<div class="card shadow-sm">
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<div class="card-body p-4">
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<form action="seo.php" method="POST">
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<div class="input-group mb-3">
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<span class="input-group-text"><i class="bi bi-link-45deg"></i></span>
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<input type="url" class="form-control form-control-lg" id="url" name="url" placeholder="https://example.com" value="<?php echo htmlspecialchars($url_input); ?>" required>
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<button type="submit" class="btn btn-primary"><i class="bi bi-search"></i> Analyze</button>
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</div>
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</form>
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<?php if ($error_message): ?>
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<div class="alert alert-danger mt-3"><?php echo $error_message; ?></div>
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<?php endif; ?>
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</div>
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</div>
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<?php if ($seo_results): ?>
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<div class="card shadow-sm mt-5">
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<div class="card-header">
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<h2 class="h4 mb-0">Analysis Results for <span class="text-primary"><?php echo htmlspecialchars($url_input); ?></span></h2>
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</div>
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<div class="card-body">
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<ul class="list-group list-group-flush">
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<li class="list-group-item d-flex justify-content-between align-items-center">
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<div><strong>Title Tag</strong> <span class="badge bg-<?php echo $seo_results['title']['status']; ?>"><?php echo $seo_results['title']['length'] > 0 ? 'OK' : 'Missing'; ?></span><br><small class="text-muted"><?php echo htmlspecialchars($seo_results['title']['text']); ?> (<?php echo $seo_results['title']['length']; ?> chars)</small></div>
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</li>
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<li class="list-group-item d-flex justify-content-between align-items-center">
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<div><strong>Meta Description</strong> <span class="badge bg-<?php echo $seo_results['description']['status']; ?>"><?php echo $seo_results['description']['length'] > 0 ? 'OK' : 'Missing'; ?></span><br><small class="text-muted"><?php echo htmlspecialchars(substr($seo_results['description']['text'], 0, 150)); ?>... (<?php echo $seo_results['description']['length']; ?> chars)</small></div>
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</li>
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<li class="list-group-item d-flex justify-content-between align-items-center">
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<div><strong>H1 Tags</strong> <small class="text-muted">Should be exactly one.</small></div>
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<span class="badge bg-<?php echo $seo_results['h1_count']['status']; ?>"><?php echo $seo_results['h1_count']['count']; ?> found</span>
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</li>
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<li class="list-group-item d-flex justify-content-between align-items-center">
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<div><strong>Image Alt Tags</strong> <small class="text-muted">All images should have descriptive alt text.</small></div>
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<span class="badge bg-<?php echo $seo_results['alt_tags']['status']; ?>"><?php echo $seo_results['alt_tags']['missing']; ?> missing / <?php echo $seo_results['alt_tags']['total']; ?> total</span>
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</li>
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<li class="list-group-item d-flex justify-content-between align-items-center">
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<div><strong>Open Graph Tags</strong> <small class="text-muted">For social media sharing.</small></div>
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<span class="badge bg-<?php echo $seo_results['og_tags']['status']; ?>"><?php echo $seo_results['og_tags']['found']; ?> found</span>
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</li>
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</ul>
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</div>
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</div>
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<?php endif; ?>
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</main>
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<footer class="bg-white text-center text-muted py-4 mt-5 border-top">
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<div class="container">
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<p class="mb-0">© <?php echo date("Y"); ?> LAMP Demo. All rights reserved.</p>
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</div>
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</footer>
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<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"></script>
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</body>
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</html>
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