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do_action( 'admin_print_styles-media-upload-popup' )

Fires when admin styles enqueued for the legacy (pre-3.5.0) media upload popup are printed.

Source

File: wp-admin/includes/media.php

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Changelog

Version Description
2.9.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/admin_print_styles-media-upload-popup