adds compute engine logging sample

Author: bshaffer

compute/README.md renamed to compute/helloworld/README.md

@@ -0,0 +1,3 @@
+# Logging for Compute Engine
+
+This app demonstrates how to log to Compute Engine from a PHP application. Full instructions at [https://cloud.google.com/error-reporting/docs/setting-up-on-compute-engine](https://cloud.google.com/error-reporting/docs/setting-up-on-compute-engine)

compute/app.php renamed to compute/helloworld/app.php

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+{
+    "require": {
+        "fluent/logger": "^1.0"
+    }
+}

compute/logging/README.md

@@ -0,0 +1,22 @@
+
+
+# [START logging]
+require_once __DIR__ . '/vendor/autoload.php';
+
+use Fluent\Logger\FluentLogger;
+
+$logger = new FluentLogger('localhost', '24224');
+
+function fluentd_exception_handler(Exception $e)
+{
+    global $logger;
+    $msg = array(
+        'message' => $e->getMessage(),
+        'serviceContext' => array('service' => 'myapp'),
+        // ... add more metadata
+    );
+    $logger->post('myapp.errors', $msg);
+}
+
+set_exception_handler('fluentd_exception_handler');
+# [END logging]