Fix "can't modify headers" error with evolutionGraph, tagCloud, and misc

1 files changed, 4 insertions, 1 deletions

diff --git a/plugins/ExampleUI/Controller.php b/plugins/ExampleUI/Controller.php
index 3419bd2498..e62927be17 100644
--- a/plugins/ExampleUI/Controller.php
+++ b/plugins/ExampleUI/Controller.php
@@ -31,6 +31,7 @@ class Piwik_ExampleUI_Controller extends Piwik_Controller
 	
 	function evolutionGraph()
 	{
+		ob_start();
 		echo "<h2>Evolution of server temperatures over the last few days</h2>";
 		$this->echoEvolutionGraph();
 	}
@@ -69,6 +70,7 @@ class Piwik_ExampleUI_Controller extends Piwik_Controller
 	
 	function tagClouds()
 	{
+		ob_start();
 		echo "<h2>Simple tag cloud</h2>";
 		$this->echoSimpleTagClouds();
 		
@@ -122,6 +124,7 @@ class Piwik_ExampleUI_Controller extends Piwik_Controller
 	
 	function misc()
 	{
+		ob_start();
 		echo "<h2>Evolution graph filtered to Google and Yahoo!</h2>";
 		$this->echoDataTableSearchEnginesFiltered();
 	}
@@ -133,4 +136,4 @@ class Piwik_ExampleUI_Controller extends Piwik_Controller
 		$view->setSearchPattern('^(Google|Yahoo!)$', 'label');
 		return $this->renderView($view);
 	}	
-}
\ No newline at end of file
+}