Laravel 5 crashed after working for a while. Here's the error:
file_put_contents(/Library/WebServer/Documents/project/vendor/services.json): failed to open stream: Permission denied
in Filesystem.php line 74
I wonder why it's trying to write to the vendor directory?
Try this artisan command
php artisan cache:clear 
(See update below!)
Some storage files used for caching were moved to a different location for Laravel v5.0.15.
Affected files:
To quote one of the devs:
It makes more sense in vendor. This makes it more clear that the file is very specifically tied to the installed dependencies.
For more information and a discussion regarding the changes, see this commit.
Update: The maintainers changed this behavior after some discussion.
As of v5.1, all three files will be written to bootstrap/cache. If you're on v5.0.*, read on:
The vendor directory will not be written to unless it is actually writable.
Additionally, the method useStoragePathForOptimizations(bool) was added to Illuminate\Foundation\App and can be called from bootstrap/app.php. This sets the property $useStoragePathForOptimizations and determines whether the storage directory should be used for optimizations.
See the following two commits for more information:
bootstrap/cache directory to store cache files. Make sure this directory is writable. Or 2) Edit bootstrap/app.php and add this line: $app->useStoragePathForOptimizations(true); Then make sure the directory storage/framework is writable. However, it's recommended to upgrade to Laravel 5.1 which is a "Long Term Support" release.
php artisan cache:clear