Add multicurl download example with success, error, and complete callbacks

Author: zachborboa

examples/multi_curl_download_with_callbacks.php

@@ -0,0 +1,21 @@
+<?php
+require __DIR__ . '/vendor/autoload.php';
+
+use \Curl\MultiCurl;
+
+$multi_curl = new MultiCurl();
+$multi_curl->success(function ($instance) {
+    echo 'call to "' . $instance->url . '" was successful.' . "\n";
+});
+$multi_curl->error(function ($instance) {
+    echo 'call to "' . $instance->url . '" was unsuccessful.' . "\n";
+    echo 'error code: ' . $instance->errorCode . "\n";
+    echo 'error message: ' . $instance->errorMessage . "\n";
+});
+$multi_curl->complete(function ($instance) {
+    echo 'call to "' . $instance->url . '" completed.' . "\n";
+});
+
+$multi_curl->addDownload('https://secure.php.net/images/logos/php-med-trans.png', '/tmp/php-med-trans.png');
+$multi_curl->addDownload('https://upload.wikimedia.org/wikipedia/commons/c/c1/PHP_Logo.png', '/tmp/PHP_Logo.png');
+$multi_curl->start();

examples/multi_curl_get_callbacks.php

@@ -15,7 +15,7 @@
     echo 'error message: ' . $instance->errorMessage . "\n";
 });
 $multi_curl->complete(function ($instance) {
-    echo 'call completed' . "\n";
+    echo 'call to "' . $instance->url . '" completed.' . "\n";
 });
 
 $multi_curl->addGet('https://www.google.com/search', array(