Add transaction handling

```php
$ctx = $client->transaction->push('/route/name');
routeName();
$client->transaction->pop($ctx);
```

lib/Raven/Client.php

@@ -102,6 +102,7 @@ public function __construct($options_or_dsn=null, $options=array())
  $this->_pending_events = array();
  $this->context = new Raven_Context();
  $this->breadcrumbs = new Raven_Breadcrumbs();
+
  $this->sdk = Raven_Util::get($options, 'sdk', array(
  'name' => 'sentry-php',
  'version' => self::VERSION,
@@ -113,6 +114,11 @@ public function __construct($options_or_dsn=null, $options=array())
  $this->_curl_handler = new Raven_CurlHandler($this->get_curl_options());
  }
 
+ $this->transaction = new Raven_TransactionStack();
+ if ($this->is_http_request() && isset($_SERVER['REQUEST_URI'])) {
+ $this->transaction->push($_SERVER['REQUEST_URI']);
+ }
+
  if (Raven_Util::get($options, 'install_default_breadcrumb_handlers', true)) {
  $this->registerDefaultBreadcrumbHandlers();
  }
@@ -416,10 +422,6 @@ public function captureException($exception, $data=null, $logger=null, $vars=nul
 
  if ($data === null) {
  $data = array();
- } elseif (!is_array($data)) {
- $data = array(
- 'culprit' => (string)$data,
- );
  }
 
  $exc = $exception;
@@ -599,6 +601,7 @@ public function get_default_data()
  'tags' => $this->tags,
  'platform' => 'php',
  'sdk' => $this->sdk,
+ 'culprit' => $this->transaction->peek(),
  );
  }
 

lib/Raven/TransactionStack.php

@@ -0,0 +1,48 @@
+<?php
+/*
+ * This file is part of Raven.
+ *
+ * (c) Sentry Team
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Raven_TransactionStack
+{
+ public function __construct()
+ {
+ $this->stack = array();
+ }
+
+ public function clear()
+ {
+ $this->stack = array();
+ }
+
+ public function peek()
+ {
+ $len = count($this->stack);
+ if ($len === 0) {
+ return null;
+ }
+ return $this->stack[$len - 1];
+ }
+
+ public function push($context)
+ {
+ $this->stack[] = $context;
+ }
+
+ public function pop($context=null)
+ {
+ if (!$context) {
+ return array_pop($this->stack);
+ }
+ while (!empty($this->stack)) {
+ if (array_pop($this->stack) === $context) {
+ return $context;
+ }
+ }
+ }
+}

test/Raven/Tests/ClientTest.php

@@ -435,17 +435,6 @@ public function testCaptureExceptionHandlesOptionsAsSecondArg()
  $this->assertEquals($event['culprit'], 'test');
  }
 
- public function testCaptureExceptionHandlesCulpritAsSecondArg()
- {
- $client = new Dummy_Raven_Client();
- $ex = $this->create_exception();
- $client->captureException($ex, 'test');
- $events = $client->getSentEvents();
- $this->assertEquals(count($events), 1);
- $event = array_pop($events);
- $this->assertEquals($event['culprit'], 'test');
- }
-
  public function testCaptureExceptionHandlesExcludeOption()
  {
  $client = new Dummy_Raven_Client(array(
@@ -514,6 +503,7 @@ public function testDefaultProcessorsContainSanitizeDataProcessor()
  public function testGetDefaultData()
  {
  $client = new Dummy_Raven_Client();
+ $client->transaction->push('test');
  $expected = array(
  'platform' => 'php',
  'project' => $client->project,
@@ -525,6 +515,7 @@ public function testGetDefaultData()
  'name' => 'sentry-php',
  'version' => $client::VERSION,
  ),
+ 'culprit' => 'test',
  );
  $this->assertEquals($expected, $client->get_default_data());
  }