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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 3 times in this file.
Line | Code |
---|---|
584 | $data = $backup_sizes['full-orig']; |
585 |
|
586 | if ( $parts['basename'] != $data['file'] ) { |
587 | if ( defined('IMAGE_EDIT_OVERWRITE') && IMAGE_EDIT_OVERWRITE ) { |
588 |
|
589 | // Delete only if it's edited image. |
590 | if ( preg_match('/-e[0-9]{13}\./', $parts['basename']) ) { |
591 |
|
592 | /** This filter is documented in wp-admin/custom-header.php */ |
593 | $delpath = apply_filters( 'wp_delete_file', $file ); |
594 | @unlink($delpath); |
595 | } |
596 | } elseif ( isset( $meta['width'], $meta['height'] ) ) { |
597 | $backup_sizes["full-$suffix"] = array('width' => $meta['width'], 'height' => $meta['height'], 'file' => $parts['basename']); |
598 | } |
599 | } |
600 |
|
601 | $restored_file = path_join($parts['dirname'], $data['file']); |
602 | $restored = update_attached_file($post_id, $restored_file); |
Line | Code |
609 | foreach ( $default_sizes as $default_size ) { |
610 | if ( isset($backup_sizes["$default_size-orig"]) ) { |
611 | $data = $backup_sizes["$default_size-orig"]; |
612 | if ( isset($meta['sizes'][$default_size]) && $meta['sizes'][$default_size]['file'] != $data['file'] ) { |
613 | if ( defined('IMAGE_EDIT_OVERWRITE') && IMAGE_EDIT_OVERWRITE ) { |
614 |
|
615 | // Delete only if it's edited image |
616 | if ( preg_match('/-e[0-9]{13}-/', $meta['sizes'][$default_size]['file']) ) { |
617 | /** This filter is documented in wp-admin/custom-header.php */ |
618 | $delpath = apply_filters( 'wp_delete_file', path_join($parts['dirname'], $meta['sizes'][$default_size]['file']) ); |
619 | @unlink($delpath); |
620 | } |
621 | } else { |
622 | $backup_sizes["$default_size-{$suffix}"] = $meta['sizes'][$default_size]; |
623 | } |
624 | } |
625 |
|
626 | $meta['sizes'][$default_size] = $data; |
627 | } else { |
Line | Code |
823 | } |
824 | } |
825 | } else { |
826 | $delete = true; |
827 | } |
828 |
|
829 | if ( $delete ) { |
830 |
|
831 | /** This filter is documented in wp-admin/custom-header.php */ |
832 | $delpath = apply_filters( 'wp_delete_file', $new_path ); |
833 | @unlink( $delpath ); |
834 | } |
835 |
|
836 | $return->msg = esc_js( __('Image saved') ); |
837 | return $return; |
838 | } |
839 |
|