diff --git a/examples/multi_curl_track_success_urls.php b/examples/multi_curl_track_success_urls.php
new file mode 100644
index 0000000..aeb730d
--- /dev/null
+++ b/examples/multi_curl_track_success_urls.php
@@ -0,0 +1,128 @@
+<?php
+
+require __DIR__ . '/../vendor/autoload.php';
+
+use Curl\MultiCurl;
+
+// List of pages to fetch.
+$urls = [
+    'https://httpbin.org/status/503',
+    'https://httpbin.org/status/200',
+    'https://httpbin.org/status/401',
+    'https://httpbin.org/delay/3',
+    'https://httpbin.org/status/201',
+    'https://httpbin.org/delay/1',
+    'https://httpbin.org/status/500',
+    'https://httpbin.org/status/504',
+];
+
+$request_stats = [
+    'all' => [],
+    'successful' => [],
+    'errors' => [],
+    'completed' => [],
+    'not_completed' => [],
+];
+
+$multi_curl = new MultiCurl();
+$multi_curl->setConcurrency(2);
+
+foreach ($urls as $url) {
+    // Queue requests.
+    $request = $multi_curl->addGet($url);
+
+    // Track all requests queued.
+    $request_stats['all'][] = $request->url;
+}
+
+// Track successful requests.
+$multi_curl->success(function ($instance) use (&$request_stats, $multi_curl) {
+    $request_stats['successful'][] = $instance->url;
+
+    // Optionally, stop additional requests based on some condition (e.g. stop
+    // after a number of successful requests).
+    if (count($request_stats['successful']) >= 3) {
+        $multi_curl->stop();
+    }
+});
+
+// Track requests that errored.
+$multi_curl->error(function ($instance) use (&$request_stats) {
+    $request_stats['errors'][] = $instance->url;
+});
+
+// Track requests that completed.
+$multi_curl->complete(function ($instance) use (&$request_stats) {
+    $request_stats['completed'][] = $instance->url;
+});
+
+$multi_curl->start();
+
+// Determine urls not completed.
+$request_stats['not_completed'] = array_diff($request_stats['all'], $request_stats['completed']);
+
+// Display results.
+var_dump($request_stats);
+
+/*
+$ php multi_curl_track_success_urls.php
+array(5) {
+  ["all"]=>
+  array(8) {
+    [0]=>
+    string(30) "https://httpbin.org/status/503"
+    [1]=>
+    string(30) "https://httpbin.org/status/200"
+    [2]=>
+    string(30) "https://httpbin.org/status/401"
+    [3]=>
+    string(27) "https://httpbin.org/delay/3"
+    [4]=>
+    string(30) "https://httpbin.org/status/201"
+    [5]=>
+    string(27) "https://httpbin.org/delay/1"
+    [6]=>
+    string(30) "https://httpbin.org/status/500"
+    [7]=>
+    string(30) "https://httpbin.org/status/504"
+  }
+  ["successful"]=>
+  array(3) {
+    [0]=>
+    string(30) "https://httpbin.org/status/200"
+    [1]=>
+    string(27) "https://httpbin.org/delay/3"
+    [2]=>
+    string(30) "https://httpbin.org/status/201"
+  }
+  ["errors"]=>
+  array(2) {
+    [0]=>
+    string(30) "https://httpbin.org/status/503"
+    [1]=>
+    string(30) "https://httpbin.org/status/401"
+  }
+  ["completed"]=>
+  array(5) {
+    [0]=>
+    string(30) "https://httpbin.org/status/200"
+    [1]=>
+    string(30) "https://httpbin.org/status/503"
+    [2]=>
+    string(30) "https://httpbin.org/status/401"
+    [3]=>
+    string(27) "https://httpbin.org/delay/3"
+    [4]=>
+    string(30) "https://httpbin.org/status/201"
+  }
+  ["not_completed"]=>
+  array(3) {
+    [5]=>
+    string(27) "https://httpbin.org/delay/1"
+    [6]=>
+    string(30) "https://httpbin.org/status/500"
+    [7]=>
+    string(30) "https://httpbin.org/status/504"
+  }
+}
+*/