How to restore code highlighting in a specific file?

Question

phpstorm

Greetings gentlemen! For the first time in a long time, I encountered the following problem in PhpStorm. In a nutshell, the steps were something like this:

1. Created a file "myfile.php" but deleted it a bit later (without " Safe Delete ")
   
2. After a while, a file with the same name was still needed. But after creation, the PHP code in it is not highlighted in the file list panel, its icon is like that of a text file.
   
3. I tried to clear the cache (" Invalidate Code "), restore a previously deleted one, but did not achieve a positive result.
   

At the same time, PHP files with any other name are created kosher and highlighting works in them as it should.
I’m scratching my head and I can’t understand whether this is a PhpStorm bug, or whether I accidentally pressed some shortcut, as a result of which this problem appeared.
PhpStorm 2016.1 Build #PS-145.258