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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 4 times in this file.
| Line | Code |
|---|---|
| 876 | |
| 877 | /** |
| 878 | * Fires after the header image is set or an error is returned. |
| 879 | * |
| 880 | * @since 2.1.0 |
| 881 | * |
| 882 | * @param string $file Path to the file. |
| 883 | * @param int $attachment_id Attachment ID. |
| 884 | */ |
| 885 | do_action( 'wp_create_file_in_uploads', $file, $attachment_id ); // For replication. |
| 886 | |
| 887 | return $this->finished(); |
| 888 | } elseif ( $width > $max_width ) { |
| 889 | $oitar = $width / $max_width; |
| 890 | |
| 891 | $image = wp_crop_image( |
| 892 | $attachment_id, |
| 893 | 0, |
| 894 | 0, |
| Line | Code |
| 899 | false, |
| 900 | str_replace( wp_basename( $file ), 'midsize-' . wp_basename( $file ), $file ) |
| 901 | ); |
| 902 | |
| 903 | if ( ! $image || is_wp_error( $image ) ) { |
| 904 | wp_die( __( 'Image could not be processed. Please go back and try again.' ), __( 'Image Processing Error' ) ); |
| 905 | } |
| 906 | |
| 907 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 908 | $image = apply_filters( 'wp_create_file_in_uploads', $image, $attachment_id ); // For replication. |
| 909 | |
| 910 | $url = str_replace( wp_basename( $url ), wp_basename( $image ), $url ); |
| 911 | $width = $width / $oitar; |
| 912 | $height = $height / $oitar; |
| 913 | } else { |
| 914 | $oitar = 1; |
| 915 | } |
| 916 | ?> |
| 917 | |
| Line | Code |
| 1058 | } else { |
| 1059 | $cropped = get_attached_file( $attachment_id ); |
| 1060 | } |
| 1061 | |
| 1062 | if ( ! $cropped || is_wp_error( $cropped ) ) { |
| 1063 | wp_die( __( 'Image could not be processed. Please go back and try again.' ), __( 'Image Processing Error' ) ); |
| 1064 | } |
| 1065 | |
| 1066 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 1067 | $cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication. |
| 1068 | |
| 1069 | $attachment = $this->create_attachment_object( $cropped, $attachment_id ); |
| 1070 | |
| 1071 | if ( ! empty( $_POST['create-new-attachment'] ) ) { |
| 1072 | unset( $attachment['ID'] ); |
| 1073 | } |
| 1074 | |
| 1075 | // Update the attachment. |
| 1076 | $attachment_id = $this->insert_attachment( $attachment, $cropped ); |
| Line | Code |
| 1402 | (int) $dimensions['dst_width'], |
| 1403 | (int) $dimensions['dst_height'] |
| 1404 | ); |
| 1405 | |
| 1406 | if ( ! $cropped || is_wp_error( $cropped ) ) { |
| 1407 | wp_send_json_error( array( 'message' => __( 'Image could not be processed. Please go back and try again.' ) ) ); |
| 1408 | } |
| 1409 | |
| 1410 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 1411 | $cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication. |
| 1412 | |
| 1413 | $attachment = $this->create_attachment_object( $cropped, $attachment_id ); |
| 1414 | |
| 1415 | $previous = $this->get_previous_crop( $attachment ); |
| 1416 | |
| 1417 | if ( $previous ) { |
| 1418 | $attachment['ID'] = $previous; |
| 1419 | } else { |
| 1420 | unset( $attachment['ID'] ); |