feat: warning PHP

Author: loks0n

templates/php/src/Client.php.twig

@@ -176,6 +176,13 @@ class Client
         $responseBody   = curl_exec($ch);
         $contentType    = $responseHeaders['content-type'] ?? '';
         $responseStatus = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+
+        $warnings = $responseHeaders['x-{{spec.title | caseLower}}-warning'] ?? '';
+        if ($warnings) {
+            foreach(explode(';', $warnings) as $warning) {
+                trigger_error($warning, E_USER_WARNING);
+            }
+        }
         
         switch(substr($contentType, 0, strpos($contentType, ';'))) {
             case 'application/json':