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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 3100 | } |
| 3101 | |
| 3102 | if ( current_user_can( 'delete_post', $attachment->ID ) ) |
| 3103 | $response['nonces']['delete'] = wp_create_nonce( 'delete-post_' . $attachment->ID ); |
| 3104 | |
| 3105 | if ( $meta && 'image' === $type ) { |
| 3106 | $sizes = array(); |
| 3107 | |
| 3108 | /** This filter is documented in wp-admin/includes/media.php */ |
| 3109 | $possible_sizes = apply_filters( 'image_size_names_choose', array( |
| 3110 | 'thumbnail' => __('Thumbnail'), |
| 3111 | 'medium' => __('Medium'), |
| 3112 | 'large' => __('Large'), |
| 3113 | 'full' => __('Full Size'), |
| 3114 | ) ); |
| 3115 | unset( $possible_sizes['full'] ); |
| 3116 | |
| 3117 | // Loop through all potential sizes that may be chosen. Try to do this with some efficiency. |
| 3118 | // First: run the image_downsize filter. If it returns something, we can use its data. |