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PhpStorm isn't recognising core PHP. For example, it's not recognising Exception, with the tooltip saying "Undefined class 'Exception'".

I've tried invalidating the cache to no avail. I've checked a colleague's installation and they appear to have no issues, and after Ctrl+Clicking on their Exception class, it links correctly to Core_c.php, which isn't the case for me. It seems like my PhpStorm isn't picking up the PHP plugin / library, and I have no idea why.

I've tried reinstalling PhpStorm to the latest version, upgrading all of my packages. I've even made sure that the php.jar plugin is actually there, and it is:

/opt/phpstorm/plugins/php/lib/php.jar

And the PHP plugin is enabled in PhpStorm.

Another problem I have with PhpStorm is that it isn't suggesting function names whenever I type them. Help would be appreciated, and I can provide additional information if needed.

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    Are you using namespaces? Write "\" in front of Exception (ex. catch(\Exception $e)) Commented Feb 2, 2017 at 10:26
  • Yes, and the code we are using is on a shared private subversion repository which everyone in my team uses, and has no issue with regarding this issue. Commented Feb 2, 2017 at 10:30
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    Just last one, actual idea.log is enough -- make sure it's the most fresh (you may close IDE; delete all logs/files there; start IDE -- wait till it loads and try that Ctrl+Click & code completion; after that close IDE and share that log file.) Can you please also show how your .php file looks like (the one that does not work). Ideally whole IDE window -- using Default unmodified color schema. P.S. If anything -- you may backup and delete IDE-wide settings and start from scratch (last resort option) Commented Feb 2, 2017 at 11:03
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    OK ... two possible solutions that I can suggest here: 1) download php stubs from github.com/JetBrains/phpstorm-stubs repo and use that field to point to a local version .. or just add it as "Include path" 2) start from scratch (close IDE; backup and delete IDE-wide settings; launch IDE and do not import settings from older version). Such settings would typically be in ~/.Phpstorm2016.3 Commented Feb 2, 2017 at 11:47
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    Thanks, I will do just that. I downloaded stubs and included them as a path in my projects, and that seems to have resolved my issue. Perhaps it's an issue with this current version - I will possibly downgrade to the previous version. Thanks again. Commented Feb 2, 2017 at 12:15

3 Answers 3

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In case that same issue appears for PhpStorm 2020.1 or later, that's a previously reported issue and invalidating caches won't help anymore.

As described here the solution is:

  1. Close IDE
  2. Locate folder where PhpStorm 2020.2 stores indexes/caches on your computer (see below)
  3. Delete that folder (as standard "Invalidate caches" does not help here)
  4. Launch IDE

Typical locations for caches folder for different OS:

  • Windows: %USERPROFILE%\AppData\Local\JetBrains\PhpStorm2020.2\caches
  • Linux: ~/.cache/JetBrains/PhpStorm2020.2/caches
  • macOS: ~/Library/Caches/JetBrains/PhpStorm2020.2/caches

https://youtrack.jetbrains.com/issue/WI-54626

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2 Comments

This should be marked as solution, in my humble opinion.
Solved from this!
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If you are working with php below 7.1, Exception won't work because it does not implement the Throwable class. The only way for your exception to work is if you extend the Exception class.What I also do is to put a slash before the exception. Like throw new \InvalidArgumentException. Hopefully this works for you. Good luck

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I believe we should consider some things here. What version of PHP are you using. Not all version of PHP supports Exception and the namespaces does matter except you are using a dependency manager which may come configured with its namespace but if you are building from scratch, you may want to consider the namespace and the version PHP

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