[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:               |     Focuses:
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Comment (by azaozz):

 Replying to [comment:12 flixos90]:

 > Reading through the conversation here, it seems we are mixing up
 environment and development mode

 Yes, exactly my thoughts! You explained it better :)

 > This leads me to think we need something closer to maybe a
 `WP_DEVELOPMENT_MODE` constant, which for example could be set to
 something like `core`, `plugin`, `theme`. By default it could be either
 not set, or an empty string, signifying that no particular development
 mode at all should be used.

 Yep, also thinking a constant would be best. Would probably be good to
 have it always set, like `WP_DEBUG`, as presumably `WP_DEVELOPMENT_MODE`
 will make WP a lot "noisier", even probably throwing fatal errors with
 backtrace when needed, etc. It can work with `core`, `plugin`, `theme`,
 `false` so checking it could be:
 {{{
 if ( WP_DEVELOPMENT_MODE ) {
 ...
 }}}
 {{{
 if ( 'theme' === WP_DEVELOPMENT_MODE ) {
 ...
 }}}
 {{{
 if ( 'core' !== WP_DEVELOPMENT_MODE ) {
 ...
 }}}
 etc.

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Ticket URL: <https://core.trac.wordpress.org/ticket/57487#comment:13>
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