If you use Symfony don't miss the plugin, it's almost (dev-)life changing.
If you use xdebug take the time to set it up (way easier these days but can still be challenging depending on your setup), breakpoints work great.
More related to all Jetbrains IDEs:
One often overlooked aspect is the database integration (look at the tabs on the right). In addition to replacing most needs for a third party program it gives you autocompletion for your in-code sql querys.
Checkout the git integration. From the "annotate" entry menu to the all fantastic diff/merging/etc tools.
Lean to use the different searches, "in path" (toggle the preview option), classname, file, or the global shift-shift.
Try all the integrated tools, the terminal & ssh, the http client, the live templates, etc.
Lean about the local history (usually in the context menu above the git entry), it will save your ass at some point (it can restore entire deleted-by-mistake folders).
PhpStorm has its flaws [0] but so far I'm shocked by how much more productive I am with it as compared to Visual Studio Code. It's like having access to a wise dev who can point out flaws with your code, turning the IDE into a learning tool.
[0] The non-native UI of PhpStorm is annoying but not a major issue. I dislike how project centric it is but I like that you can configure almost every setting on a per project level. It's also very expensive for solo devs (edit: actually the monthly cost for individual use seems to be 8.9 EUR which isn't that bad).
- "Search Everywhere" with double tapping shift (at least on mine) is really nice. And the fuzzy file search might be the thing I use most often. - Git support is great, especially the shelving changes support. - I use navigating around words using Alt+arrow-left/arrow-right all the time as well. - "Extend selection" command can be very useful for selecting increasingly larger blocks intelligently. - Go to matching symbol (default Ctrl-Shift-M on KDE keymap) is useful
Loads more, I read the daily tips to figure out some of the newer stuff, or look through the keymap.
If you like Vim style keys, there's a plugin for that.