[wp-trac] [WordPress Trac] #55711: Introduce a function to determine whether a function can be called.

[WordPress Trac]

#55711: Introduce a function to determine whether a function can be called.
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 Reporter:  theode              |       Owner:  SergeyBiryukov
     Type:  enhancement         |      Status:  accepted
 Priority:  normal              |   Milestone:  6.2
Component:  General             |     Version:
 Severity:  normal              |  Resolution:
 Keywords:  php8 needs-refresh  |     Focuses:  administration
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Changes (by SergeyBiryukov):

 * keywords:  php8 needs-patch => php8 needs-refresh
 * owner:  (none) => SergeyBiryukov
 * status:  new => accepted
 * milestone:  Future Release => 6.2


Comment:

 `function_exists()` seems to match what we generally use in other places
 of core to check for potentially disabled functions, e.g. `ini_get()`, so
 I'm not quite sure why this ticket is blocked in search of a different
 solution.

 Doing the same for `set_time_limit()` seems like a good first step here.
 [https://github.com/WordPress/wordpress-develop/pull/3716 PR 3716] could
 use a refresh to exclude external libraries (getID3, PHPMailer), but
 otherwise looks good to me.

 A new ticket could then be opened to explore alternatives to
 `function_exists()` if there is evidence of its unreliability, and to
 replace all of its instances in core.

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Ticket URL: <https://core.trac.wordpress.org/ticket/55711#comment:21>
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