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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 862 | wp_update_attachment_metadata( $attachment_id, wp_generate_attachment_metadata( $attachment_id, $cropped ) ); |
| 863 | |
| 864 | $width = $dst_width; |
| 865 | $height = $dst_height; |
| 866 | $this->set_header_image( compact( 'url', 'attachment_id', 'width', 'height' ) ); |
| 867 | |
| 868 | // cleanup |
| 869 | $medium = str_replace( basename( $original ), 'midsize-' . basename( $original ), $original ); |
| 870 | if ( file_exists( $medium ) ) |
| 871 | @unlink( apply_filters( 'wp_delete_file', $medium ) ); |
| 872 | if ( empty( $_POST['create-new-attachment'] ) && empty( $_POST['skip-cropping'] ) ) |
| 873 | @unlink( apply_filters( 'wp_delete_file', $original ) ); |
| 874 | |
| 875 | return $this->finished(); |
| 876 | } |
| 877 | |
| 878 | /** |
| 879 | * Display last step of custom header image page. |
| 880 | * |
| 881 | * @since 2.1.0 |
| 882 | */ |