update schema validator

.hta_slug/schema-validator.php

@@ -0,0 +1,87 @@
+<?php
+header('Content-Type: application/json; charset=utf-8');
+
+$input = json_decode(file_get_contents("php://input"), true);
+$url = $input['url'] ?? null;
+
+$response = [
+  "success" => false,
+  "detected" => [],
+  "errors" => [],
+  "warnings" => [],
+  "info" => []
+];
+
+if (!$url || !filter_var($url, FILTER_VALIDATE_URL)) {
+  $response['errors'][] = "Valid URL required";
+  echo json_encode($response);
+  exit;
+}
+
+/* fetch html */
+$ch = curl_init($url);
+curl_setopt_array($ch, [
+  CURLOPT_RETURNTRANSFER => true,
+  CURLOPT_FOLLOWLOCATION => true,
+  CURLOPT_TIMEOUT => 20,
+  CURLOPT_USERAGENT => 'SchemaValidatorBot/1.0',
+  CURLOPT_ENCODING => '' // gzip support
+]);
+
+$html = curl_exec($ch);
+curl_close($ch);
+
+if (!$html) {
+  $response['errors'][] = "Failed to fetch URL";
+  echo json_encode($response);
+  exit;
+}
+
+/* extract JSON-LD */
+preg_match_all(
+  '/<script[^>]+type=["\']application\/ld\+json["\'][^>]*>(.*?)<\/script>/is',
+  $html,
+  $matches
+);
+
+if (empty($matches[1])) {
+  $response['warnings'][] = "No schema found in initial HTML";
+
+  // heuristic for SPA
+  if (
+    stripos($html, '__NEXT_DATA__') !== false ||
+    stripos($html, 'id="root"') !== false ||
+    stripos($html, 'data-reactroot') !== false
+  ) {
+    $response['info'][] =
+      "This site appears to be client-side rendered. Schema may exist but cannot be validated using PHP-only.";
+  }
+
+  echo json_encode($response, JSON_PRETTY_PRINT);
+  exit;
+}
+
+/* analyze schemas */
+foreach ($matches[1] as $schema) {
+  $json = json_decode($schema, true);
+
+  if (json_last_error() !== JSON_ERROR_NONE) {
+    $response['errors'][] = json_last_error_msg();
+    continue;
+  }
+
+  if (isset($json['@type'])) {
+    $response['detected'][] = $json['@type'];
+  } elseif (isset($json[0])) {
+    foreach ($json as $item) {
+      if (isset($item['@type'])) {
+        $response['detected'][] = $item['@type'];
+      }
+    }
+  }
+}
+
+$response['detected'] = array_values(array_unique($response['detected']));
+$response['success'] = empty($response['errors']);
+
+echo json_encode($response, JSON_PRETTY_PRINT);