[wp-trac] [WordPress Trac] #57580: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in functions.php

[WordPress Trac]

#57580: strpos(): Passing null to parameter #1 ($haystack) of type string is
deprecated  in functions.php
--------------------------+----------------------
 Reporter:  ipajen        |       Owner:  (none)
     Type:  defect (bug)  |      Status:  closed
 Priority:  normal        |   Milestone:
Component:  General       |     Version:  6.2
 Severity:  normal        |  Resolution:  invalid
 Keywords:  PHP81 close   |     Focuses:
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Comment (by sabernhardt):

 **Update:** both plugins mentioned in the description fixed their use of
 `add_submenu_page()` ([https://wpreviewslider.userecho.com/knowledge-
 bases/2/articles/88-change-log review plugin's version 11.5.9] and
 [https://plugins.trac.wordpress.org/browser/ninja-
 forms?order=name#tags/3.6.17/includes forms plugin version 3.6.17]).

 The `add_submenu_page()` function has required strings for its first five
 parameters since [12914], but a
 [https://wpdirectory.net/search/01HHD6Z8T4Y1ACTKK68HJ5CNJJ directory
 search] found many other plugins with `null` as at least one of those
 parameters. //Maybe// that could justify adding a `_doing_it_wrong()`
 message to `add_submenu_page()` and/or `add_menu_page()`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/57580#comment:11>
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