Using psysh in Shared Hosting or Limited User Environments

When using psysh or Laravel’s php artisan tinker in a limited user’s environment, you may run into this error:

Unable to create PsySH runtime directory. Make sure PHP is able to write to {some directory path} in order to continue.

This is caused by psysh trying to use a path that’s not accessible to the user.

To fix, add a file at ~/.config/psysh/config.php with this content:

<?php
return [
    'runtimeDir' => '~/tmp'
];

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