[wp-trac] [WordPress Trac] #57487: Add support for "development mode"

[WordPress Trac]

#57487: Add support for "development mode"
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 Reporter:  azaozz                        |       Owner:  (none)
     Type:  enhancement                   |      Status:  new
 Priority:  normal                        |   Milestone:  Future Release
Component:  General                       |     Version:
 Severity:  normal                        |  Resolution:
 Keywords:  needs-patch needs-unit-tests  |     Focuses:
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Changes (by flixos90):

 * keywords:   => needs-patch needs-unit-tests


Comment:

 Replying to [comment:15 SergeyBiryukov]:
 > > {{{
 > > function wp_development_mode() {
 > >     $development_mode = defined( 'WP_DEVELOPMENT_MODE' ) ?
 WP_DEVELOPMENT_MODE : false;
 > >     return apply_filters( 'wp_development_mode', $development_mode );
 > > }
 > > }}}
 >
 > This looks good to me :) Should we also check for an environment
 variable if set, or would the constant and the filter be enough for now?

 I think we could do it without an environment variable for now, since e.g.
 `WP_DEBUG` doesn't have an environment variable either.
 `WP_ENVIRONMENT_TYPE` supports an environment variable, but arguably that
 also makes more sense there than here, since the environment type is, even
 per the naming, directly tied to the environment, whereas the development
 mode is not.

 Something else I'd just like to note is that we should probably validate
 in the eventual code that the value from the constant/filter is one of the
 allowed values; didn't include it in this mini code example, but later in
 the PR I think we should have it.

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Ticket URL: <https://core.trac.wordpress.org/ticket/57487#comment:16>
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