Fires in the admin header for each specific form tab in the legacy (pre-3.5.0) media upload popup.
The dynamic portion of the hook name, $content_func, refers to the form callback for the media upload type.
do_action( "admin_head_{$content_func}" );
| Version | Description |
|---|---|
| 2.5.0 | Introduced. |
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https://developer.wordpress.org/reference/hooks/admin_head_content_func