Properly handle multiple http status lines.

src/Models/HttpPaginatedResponse.php

@@ -73,20 +73,36 @@ public function __construct( \Ably\AblyRest $ably, $model, $cipherParams,
         }
     }
 
-    private function parseHeaders( $headers ) {
+    private function parseHeaders($headers) {
         $headers = explode("\n", $headers);
-        $http = array_shift($headers);
-        $http = explode(' ', $http);
 
-        $this->statusCode = $http[1] * 1;
         $this->headers = [];
+        $this->statusCode = null;
+
+        foreach ($headers as $header) {
+            if (!trim($header)) {
+                continue;
+            }
+
+            // Handle HTTP status lines, there could be more
+            if (strncmp($header, 'HTTP/', 5) === 0) {
+                $http = explode(' ', trim($header));
+                if (isset($http[1]) && is_numeric($http[1])) {
+                    $this->statusCode = (int) $http[1];
+                }
+
+                // Reset headers for new response block
+                $this->headers = [];
+                continue;
+            }
+
+            if (!str_contains($header, ':')) {
+                continue;
+            }
 
-        foreach($headers as $header) {
-            if(!trim($header)) continue;
             list($key, $value) = explode(':', $header, 2);
             $key = trim($key);
 
-            // Title-Case
             $key = preg_replace_callback('/\w+/', function ($match) {
                 return ucfirst(strtolower($match[0]));
             }, $key);