php - symfony2 enabling dev environment debug tools(symfony profiler) -

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i forgot how enable debug tools symfony2 provides dev environment. i'm sure i'm accessing project through app_dev.php, still don't debug tool wrapped around site when visit safari.
i'm planning upgrade project, first need check whether i'm using deprecated functions, , debug tools provide info.

as said in comments, need have valid html profiler show up.
first removed in base twig template , wrote 'test'. wasn't enough. following was:

<!doctype html> <html> <head> </head>     <body>         <h>test</h>     </body> </html>

now web toolbar wanted.


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