Handle key generation when key is not present in .env

[paulbalandan]

Description
Fixes #6838

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[totoprayogo1916]

A new problem arises if the encryption.key is already filled and then marked with a hash.
The new key cannot be made active.

# encryption.key = hex2bin:ac14ecef198655f6f465e6bbd0715f2b0eb107c7efb9663d75e7df7574f9757c

[paulbalandan]

key:generate relies on env() to get the replaceable key. If the key is commented out, env() will return ''.

$currentKey = env('encryption.key', '');

[totoprayogo1916]

What I mean is,
encryption.key that has been filled in and marked with the hash

when run spark key:generate,
The .env file does not make the encryption.key active.
And the encryption.key still remains with the hash mark.

[paulbalandan]

Okay. I got what you mean. This is because preg_replace() did not find the old key in the file because it thinks it is an empty string.

[paulbalandan]

@totoprayogo1916 Kindly check new code

[totoprayogo1916]

It works

[samsonasik]

Thank you @paulbalandan