[wp-trac] [WordPress Trac] #53635: PHP 8.1: various compatibility fixes

[WordPress Trac]

#53635: PHP 8.1: various compatibility fixes
----------------------------+-------------------------------
 Reporter:  SergeyBiryukov  |       Owner:  (none)
     Type:  task (blessed)  |      Status:  new
 Priority:  normal          |   Milestone:  5.9
Component:  General         |     Version:
 Severity:  normal          |  Resolution:
 Keywords:  php81           |     Focuses:  coding-standards
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Changes (by jrf):

 * Attachment "53635-WP_Theme-arrayaccess.patch" added.

 Fix various "Deprecated: Return type of WP_Theme::[METHODNAME]($offset)
 should either be compatible with ArrayAccess::[METHODNAME](): type, or the
 #[ReturnTypeWillChange] attribute should be used to temporarily suppress
 the notice"

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Ticket URL: <https://core.trac.wordpress.org/ticket/53635>
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