[wp-trac] [WordPress Trac] #64087: Deprecated urlencode() passing null warning during load-styles.php because get_stylesheet_directory() returns empty

[WordPress Trac]

#64087: Deprecated urlencode() passing null warning during load-styles.php because
get_stylesheet_directory() returns empty
-------------------------+-------------------------------------------------
 Reporter:  jerclarke    |       Owner:  (none)
     Type:  defect       |      Status:  new
  (bug)                  |
 Priority:  normal       |   Milestone:  7.0
Component:  Script       |     Version:
  Loader                 |
 Severity:  minor        |  Resolution:
 Keywords:  php8         |     Focuses:  administration, performance, php-
  reporter-feedback      |  compatibility
-------------------------+-------------------------------------------------

Comment (by westonruter):

 Replying to [comment:10 jerclarke]:
 > I didn't dig into WHY that filter returns null, but now that I know that
 errors are **expected** during `load-styles.php`, I'm disinclined to spend
 more time on it.

 I think it's because `load-scripts.php` and `load-styles.php` load
 `noop.php` in which `apply_filters` is [https://github.com/WordPress
 /wordpress-develop/blob/f041be2a79eb9694217d716da3bf6d53f63a2173/src/wp-
 admin/includes/noop.php#L37-L40 defined] as:

 {{{#!php
 <?php
 function apply_filters() {}
 }}}

 So that explains why `null` is returned when applying the filters 😬

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Ticket URL: <https://core.trac.wordpress.org/ticket/64087#comment:11>
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