[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:  new
 Priority:  normal        |   Milestone:  6.4
Component:  General       |     Version:  6.2
 Severity:  normal        |  Resolution:
 Keywords:  PHP81 close   |     Focuses:
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Changes (by oglekler):

 * milestone:  6.3 => 6.4


Comment:

 Due to lack of activity and a patch, I am moving this ticket to the 6.4
 milestone.

 Additionally, if Twenty Twenty-One theme is causing an error, it needs to
 be fixed in theme as well separately from the solution which can be made
 in the Core itself.

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Ticket URL: <https://core.trac.wordpress.org/ticket/57580#comment:9>
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