Used By
| Used By | Description | 
|---|---|
| wp-admin/includes/media.php: wp_iframe() | Outputs the iframe to display the media upload page. | 
Fires when scripts enqueued for the admin header for the legacy (pre-3.5.0) media upload popup are printed.
| Version | Description | 
|---|---|
| 2.9.0 | Introduced. | 
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Licensed under the GNU GPLv2+ License.
    https://developer.wordpress.org/reference/hooks/admin_head-media-upload-popup