[wp-trac] [WordPress Trac] #54682: PHP Notice when adding 'custom_header' support to block theme

[WordPress Trac]

#54682: PHP Notice when adding 'custom_header' support to block theme
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 Reporter:  afragen       |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  trunk
 Severity:  major         |   Keywords:  has-patch
  Focuses:                |
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 When adding `add_theme_support( 'custom_header' );` to a block theme in
 5.9-beta a PHP warning is thrown on `wp-admin/menu.php:231` as
 `$customize_url` hasn't been defined.

 As `$customize_url` is defined inside a conditional that may not fire and
 is unset about 20 lines down the code, it should be defined outside of the
 conditional.

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Ticket URL: <https://core.trac.wordpress.org/ticket/54682>
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