Improve accuracy of timeout call by using microtime()

Author: zachborboa

tests/PHPCurlClass/server.php

@@ -274,17 +274,19 @@
     $server->serve($unsafe_file_path);
     exit;
 } elseif ($test === 'timeout') {
+    // Use --no-buffer to view loading indicator (e.g.
+    // curl --header "X-DEBUG-TEST: timeout" --include --no-buffer 127.0.0.1:8000/?seconds=3).
     header('Content-Type: application/json');
-    $unsafe_seconds = $_GET['seconds'];
-    $start = time();
+    $unsafe_seconds = (int)$_GET['seconds'];
+    $start = microtime(true);
     echo '{' . "\n";
     echo '  "loading": "';
     while (true) {
         echo '.';
         ob_flush();
         flush();
         sleep(1);
-        $elapsed = time() - $start;
+        $elapsed = microtime(true) - $start;
         if ($elapsed >= $unsafe_seconds) {
             break;
         }