I recently switched from PHPStorm to IntelliJ Ultimate because of some Java. But still i am working a lot on PHP and symfony projects.
One thing i usually do on symfony projects in PHPStorm is to edit the “Directories” in the settings to avoid having results from var/cache or var/logs in the search results.
Also it slows down the search which i heavily use. So i exlude all folders that should not be searched because they are cache files or are redundant in some other way.