do_action( “admin_head_{$content_func}” )

Fires in the admin header for each specific form tab in the legacy (pre-3.5.0) media upload popup.

Description

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}" );

Used by	Description
wp_iframe()`wp-admin/includes/media.php`	Outputs the iframe to display the media upload page.

Version	Description
2.5.0	Introduced.

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