Prefer strict PHP comparisons over loose PHP comparisons (batch 2)

[pikamander2]

(Continuation of #48965)

Here are some more patch files to change loose comparisons to strict comparisons

[pikamander2]

@SergeyBiryukov - Here's another batch of strict comparisons.

[mukesh27]

@pikamander2 can you please update comment.php.2.patch patch?

if ( $comment->comment_approved != '0' ) { // if not unapproved

Replace to

if ( '0' !== $comment->comment_approved ) { // if not unapproved

[pikamander2]

@mukesh27 - Sorry for the late reply.

I was hesitant to replace the loose comparisons that involved things like '0' or 0 because that would change the resulting logic when comparing it to things like null or false.

For backwards compatibility reasons, I think it would be best to do the easy ones first and then revisit comparisons like the one you mentioned later on.

[SergeyBiryukov]

In 47785:

Coding Standards: Use strict comparison in some wp-admin files.

Props pikamander2, mukesh27, SergeyBiryukov.
Fixes #49239.

[SergeyBiryukov]

In 47787:

Coding Standards: Correct db_version check in wp-admin/admin.php.

Follow-up to [47785].

See #49239.