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Is there a WordPress conditional tag for checking if the user is viewing the add media popup after clicking the Add media button? If none, is there an alternative function that can be used? Thanks for any tips and advice.

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up vote 2 down vote accepted

There are multiple actions available. Demo:

add_action( 'upload_ui_over_quota', 'wpse_78085_callback' );
add_action( 'pre-upload-ui', 'wpse_78085_callback' );
add_action( 'pre-plupload-upload-ui', 'wpse_78085_callback' );
add_action( 'post-plupload-upload-ui', 'wpse_78085_callback' );
add_action( 'post-upload-ui', 'wpse_78085_callback' );

function wpse_78085_callback()
    # see wp-includes/media-template.php
    print '<pre>' . current_filter() . '</pre>';


enter image description here

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