PHP Parse error: syntax error, unexpected '_592_000' get error plea…

[alfstylecat]

…se check and fix

Each pull request should address a single issue and have a meaningful title.

• All bug fixes should be sent to the "develop" branch, this is where the next bug fix version will be developed.
• PRs with any enhancement should be sent to the next minor version branch, e.g. "4.3"

Description
Explain what you have changed, and why.

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

[kenjis]

Thank you for taking time to improve CodeIgniter.

But this PR is not acceptable. Now we use PHP 7.4 or later.
And we use 2_592_000 as our coding style.

See also #6327