[wp-trac] [WordPress Trac] #51729: "Uncaught TypeError: is_file(): Argument #1 ($filename) must be of type string, array given" when using the 'mce_external_languages' filter (was: PHP 8.0 issue)

[WordPress Trac]

#51729: "Uncaught TypeError: is_file(): Argument #1 ($filename) must be of type
string, array given" when using the 'mce_external_languages' filter
--------------------------+------------------------------
 Reporter:  BackuPs       |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Editor        |     Version:  trunk
 Severity:  normal        |  Resolution:
 Keywords:  php8          |     Focuses:
--------------------------+------------------------------
Changes (by SergeyBiryukov):

 * component:  General => Editor


Old description:

> Hi
>
> Is wordpress latest beta php 8.0 compatible as i am getting a fatal error
> what used to work perfect in php 7.4 or before
>
> https://share.getcloudapp.com/P8uyPYw4?utm_source=show
>

> Fatal error: Uncaught TypeError: is_file(): Argument #1 ($filename) must
> be of type string, array given in /var/docs/wpdemo.tst/public/wp-includes
> /class-wp-editor.php on line 489
> ( ! ) TypeError: is_file(): Argument #1 ($filename) must be of type
> string, array given in /var/docs/wpdemo.tst/public/wp-includes/class-wp-
> editor.php on line 489

New description:

 Hi

 Is wordpress latest beta php 8.0 compatible as i am getting a fatal error
 what used to work perfect in php 7.4 or before

 https://share.getcloudapp.com/P8uyPYw4?utm_source=show

 {{{
 Fatal error: Uncaught TypeError: is_file(): Argument #1 ($filename) must
 be of type string, array given in /var/docs/wpdemo.tst/public/wp-includes
 /class-wp-editor.php on line 489
 ( ! ) TypeError: is_file(): Argument #1 ($filename) must be of type
 string, array given in /var/docs/wpdemo.tst/public/wp-includes/class-wp-
 editor.php on line 489
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/51729#comment:4>
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