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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 |
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495 |
|
496 | if ( isset($backup_sizes['full-orig']) && is_array($backup_sizes['full-orig']) ) { |
497 | $data = $backup_sizes['full-orig']; |
498 |
|
499 | if ( $parts['basename'] != $data['file'] ) { |
500 | if ( defined('IMAGE_EDIT_OVERWRITE') && IMAGE_EDIT_OVERWRITE ) { |
501 | // delete only if it's edited image |
502 | if ( preg_match('/-e[0-9]{13}\./', $parts['basename']) ) { |
503 | /** This filter is documented in wp-admin/custom-header.php */ |
504 | $delpath = apply_filters('wp_delete_file', $file); |
505 | @unlink($delpath); |
506 | } |
507 | } elseif ( isset( $meta['width'], $meta['height'] ) ) { |
508 | $backup_sizes["full-$suffix"] = array('width' => $meta['width'], 'height' => $meta['height'], 'file' => $parts['basename']); |
509 | } |
510 | } |
511 |
|
512 | $restored_file = path_join($parts['dirname'], $data['file']); |
513 | $restored = update_attached_file($post_id, $restored_file); |
Line | Code |
519 |
|
520 | foreach ( $default_sizes as $default_size ) { |
521 | if ( isset($backup_sizes["$default_size-orig"]) ) { |
522 | $data = $backup_sizes["$default_size-orig"]; |
523 | if ( isset($meta['sizes'][$default_size]) && $meta['sizes'][$default_size]['file'] != $data['file'] ) { |
524 | if ( defined('IMAGE_EDIT_OVERWRITE') && IMAGE_EDIT_OVERWRITE ) { |
525 | // delete only if it's edited image |
526 | if ( preg_match('/-e[0-9]{13}-/', $meta['sizes'][$default_size]['file']) ) { |
527 | /** This filter is documented in wp-admin/custom-header.php */ |
528 | $delpath = apply_filters( 'wp_delete_file', path_join($parts['dirname'], $meta['sizes'][$default_size]['file']) ); |
529 | @unlink($delpath); |
530 | } |
531 | } else { |
532 | $backup_sizes["$default_size-{$suffix}"] = $meta['sizes'][$default_size]; |
533 | } |
534 | } |
535 |
|
536 | $meta['sizes'][$default_size] = $data; |
537 | } else { |
Line | Code |
720 | $return->thumbnail = "$file_url?w=128&h=128"; |
721 | } |
722 | } |
723 | } else { |
724 | $delete = true; |
725 | } |
726 |
|
727 | if ( $delete ) { |
728 | /** This filter is documented in wp-admin/custom-header.php */ |
729 | $delpath = apply_filters('wp_delete_file', $new_path); |
730 | @unlink( $delpath ); |
731 | } |
732 |
|
733 | $return->msg = esc_js( __('Image saved') ); |
734 | return $return; |
735 | } |
736 |
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