Changeset 61576

Timestamp:

02/02/2026 06:13:27 AM (5 weeks ago)

Author:

westonruter

Message:

Customize: Use wp_check_filetype() instead of substr() to extract file extension.

This fixes compatibility with image files that have 4-character extensions, such as .webp and .avif.

Follow-up to [57524], [50810], [30309].

Props buutqn, westonruter.
See #51228, #35725, #21483.
Fixes #64557.

Location:

trunk

Files:

• src/wp-includes/customize/class-wp-customize-media-control.php (modified) (1 diff)
• tests/phpunit/tests/customize/media-control.php (added)

trunk/src/wp-includes/customize/class-wp-customize-media-control.php

@@ -93 +93 @@
                  * Note that the default value must be a URL, NOT an attachment ID.
                  */
-                $ext  = substr( $this->setting->default, -3 );
-                $type = in_array( $ext, array( 'jpg', 'png', 'gif', 'bmp', 'webp', 'avif' ), true ) ? 'image' : 'document';
+                $ext       = wp_check_filetype( $this->setting->default )['ext'];
+                $ext_types = wp_get_ext_types();
+                $type      = isset( $ext_types['image'] ) && in_array( $ext, $ext_types['image'], true ) ? 'image' : 'document';
 
                 $default_attachment = array(