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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 |
|---|---|
| 869 | |
| 870 | /** |
| 871 | * Fires after the header image is set or an error is returned. |
| 872 | * |
| 873 | * @since 2.1.0 |
| 874 | * |
| 875 | * @param string $file Path to the file. |
| 876 | * @param int $attachment_id Attachment ID. |
| 877 | */ |
| 878 | do_action( 'wp_create_file_in_uploads', $file, $attachment_id ); // For replication. |
| 879 | |
| 880 | return $this->finished(); |
| 881 | } elseif ( $width > $max_width ) { |
| 882 | $oitar = $width / $max_width; |
| 883 | |
| 884 | $image = wp_crop_image( |
| 885 | $attachment_id, |
| 886 | 0, |
| 887 | 0, |
| Line | Code |
| 892 | false, |
| 893 | str_replace( wp_basename( $file ), 'midsize-' . wp_basename( $file ), $file ) |
| 894 | ); |
| 895 | |
| 896 | if ( ! $image || is_wp_error( $image ) ) { |
| 897 | wp_die( __( 'Image could not be processed. Please go back and try again.' ), __( 'Image Processing Error' ) ); |
| 898 | } |
| 899 | |
| 900 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 901 | $image = apply_filters( 'wp_create_file_in_uploads', $image, $attachment_id ); // For replication. |
| 902 | |
| 903 | $url = str_replace( wp_basename( $url ), wp_basename( $image ), $url ); |
| 904 | $width = $width / $oitar; |
| 905 | $height = $height / $oitar; |
| 906 | } else { |
| 907 | $oitar = 1; |
| 908 | } |
| 909 | ?> |
| 910 | |
| Line | Code |
| 1051 | } else { |
| 1052 | $cropped = get_attached_file( $attachment_id ); |
| 1053 | } |
| 1054 | |
| 1055 | if ( ! $cropped || is_wp_error( $cropped ) ) { |
| 1056 | wp_die( __( 'Image could not be processed. Please go back and try again.' ), __( 'Image Processing Error' ) ); |
| 1057 | } |
| 1058 | |
| 1059 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 1060 | $cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication. |
| 1061 | |
| 1062 | $attachment = $this->create_attachment_object( $cropped, $attachment_id ); |
| 1063 | |
| 1064 | if ( ! empty( $_POST['create-new-attachment'] ) ) { |
| 1065 | unset( $attachment['ID'] ); |
| 1066 | } |
| 1067 | |
| 1068 | // Update the attachment. |
| 1069 | $attachment_id = $this->insert_attachment( $attachment, $cropped ); |
| Line | Code |
| 1394 | (int) $dimensions['dst_width'], |
| 1395 | (int) $dimensions['dst_height'] |
| 1396 | ); |
| 1397 | |
| 1398 | if ( ! $cropped || is_wp_error( $cropped ) ) { |
| 1399 | wp_send_json_error( array( 'message' => __( 'Image could not be processed. Please go back and try again.' ) ) ); |
| 1400 | } |
| 1401 | |
| 1402 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 1403 | $cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication. |
| 1404 | |
| 1405 | $attachment = $this->create_attachment_object( $cropped, $attachment_id ); |
| 1406 | |
| 1407 | $previous = $this->get_previous_crop( $attachment ); |
| 1408 | |
| 1409 | if ( $previous ) { |
| 1410 | $attachment['ID'] = $previous; |
| 1411 | } else { |
| 1412 | unset( $attachment['ID'] ); |