[wp-trac] [WordPress Trac] #54730: PHP 8.x: various compatibility fixes for WordPress 6.0

[WordPress Trac]

#54730: PHP 8.x: various compatibility fixes for WordPress 6.0
------------------------------+------------------------
 Reporter:  hellofromTonya    |      Owner:  (none)
     Type:  task (blessed)    |     Status:  new
 Priority:  normal            |  Milestone:  6.0
Component:  General           |    Version:
 Severity:  normal            |   Keywords:  php8 php81
  Focuses:  coding-standards  |
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 Previously:

 * #53635 (5.9)
 * #50913 (5.6)

 This ticket will be used as an "epic", allowing a variety of small patches
 each fixing a specific failure to be added to and committed against this
 ticket.

 For patches addressing all instances of failures related to one specific
 PHP version (such as PHP 8.0, 8.1, or 8.2) change across the codebase,
 separate tickets should still be opened.

 For an example of issues/patches with separate tickets, see:
 * #53299 PHP 8.1: Update `is_serialized` function to accept Enums
 * #53465 PHP 8.1.: the default value of the flags parameter for
 `htmlentities()` et all needs to be explicitly set

 When opening a separate ticket, please tag it with the appropriate PHP
 version keyword so that these tickets can be easily found:

 * PHP 8.2: keyword is `php82` with its report
 https://core.trac.wordpress.org/query?keywords=~php82
 * PHP 8.1: keyword is `php81` with its report
 https://core.trac.wordpress.org/query?keywords=~php81
 * PHP 8.0: keyword is `php8` with its report
 https://core.trac.wordpress.org/query?keywords=~php8

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Ticket URL: <https://core.trac.wordpress.org/ticket/54730>
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