New in Symfony 5.4: Profiler improvements
Symfony profiler provides an immense amount of debug information to quickly find the cause of any problem. However, that comes at a price, because the profiler must collect all that information while serving the request. This can slowdown the application even for requests where you don't look at the profiler information (which are most of them).
In Symfony 5.4 you can enable the profiler conditionally. To do that, add these two new config options:
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# config/packages/dev/web_profiler.yaml framework: profiler: collect: false collect_parameter: 'profile'
collect: false option disables the profiler by default and the
collect_parameter: profile option enables it for requests that include the
profile query parameter.
You can freely choose the query parameter name and you can also enable the profiler by submitting a form field with that name (useful for POST requests) and even a request attribute.
First, the web debug toolbar now shows the security roles of the logged in user (this only includes the roles assigned to the user directly, not the roles assigned to them via the security roles inheritance):
Second, the security profiler panel includes a new tab called "Authenticators" where you can check the security authenticators that were called during the request:
The Symfony profiler includes an "Emails" panel where you can inspect the details of the emails sent during the processing of the request. When the email is complex, checking its HTML contents is not practical. In Symfony 5.4 we're improving this panel to also preview the rendered HTML contents of the email:
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