Why action in symfony2 is executed twice?

Question

symfony

Good day. I started learning symfony2 and ran into this problem: for some reason, all actions are executed twice. I noticed this when I tried to fasten the captcha, the code was generated incorrectly there - I generate it, look at the session - everything is correct, but then I switch to, say, the main one with var_dump($_SESSION) and there is already a completely different one. I output the code from the method that generates it to the browser - it is displayed once in the browser, I output it to a file - twice. I thought about the crookedness of the bundle and scored, now I'm playing with swiftmailer and the same problem. I call indexAction once with the creation of a letter in the browser, and two letters are created, and they are absolutely identical. Where to dig?

Answer 1

Oh, as usual, it's a matter of inattention. The problem was in the layout. The person who did the layout did this: <img src="#" />- the page turns out to itself constantly and turned to each request. Removed sharp, everything was fine.

Answer 2

var_dump($_SESSION)

you are using symfony... don't use superglobals
favicon, look at the access logs.