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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 |
|---|---|
| 748 | // Update the attachment |
| 749 | wp_insert_attachment($object, $cropped); |
| 750 | wp_update_attachment_metadata( $attachment_id, wp_generate_attachment_metadata( $attachment_id, $cropped ) ); |
| 751 | update_post_meta( $attachment_id, '_wp_attachment_is_custom_header', get_option('stylesheet' ) ); |
| 752 | |
| 753 | set_theme_mod('header_image', $url); |
| 754 | |
| 755 | // cleanup |
| 756 | $medium = str_replace(basename($original), 'midsize-'.basename($original), $original); |
| 757 | @unlink( apply_filters( 'wp_delete_file', $medium ) ); |
| 758 | @unlink( apply_filters( 'wp_delete_file', $original ) ); |
| 759 | |
| 760 | return $this->finished(); |
| 761 | } |
| 762 | |
| 763 | /** |
| 764 | * Display last step of custom header image page. |
| 765 | * |
| 766 | * @since 2.1.0 |
| 767 | */ |