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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 |
|---|---|
| 822 | |
| 823 | /** |
| 824 | * Fires after the header image is set or an error is returned. |
| 825 | * |
| 826 | * @since 2.1.0 |
| 827 | * |
| 828 | * @param string $file Path to the file. |
| 829 | * @param int $attachment_id Attachment ID. |
| 830 | */ |
| 831 | do_action( 'wp_create_file_in_uploads', $file, $attachment_id ); // For replication. |
| 832 | |
| 833 | return $this->finished(); |
| 834 | } elseif ( $width > $max_width ) { |
| 835 | $oitar = $width / $max_width; |
| 836 | $image = wp_crop_image( $attachment_id, 0, 0, $width, $height, $max_width, $height / $oitar, false, str_replace( wp_basename( $file ), 'midsize-' . wp_basename( $file ), $file ) ); |
| 837 | if ( ! $image || is_wp_error( $image ) ) { |
| 838 | wp_die( __( 'Image could not be processed. Please go back and try again.' ), __( 'Image Processing Error' ) ); |
| 839 | } |
| 840 | |
| 841 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 842 | $image = apply_filters( 'wp_create_file_in_uploads', $image, $attachment_id ); // For replication. |
| 843 | |
| 844 | $url = str_replace( wp_basename( $url ), wp_basename( $image ), $url ); |
| 845 | $width = $width / $oitar; |
| 846 | $height = $height / $oitar; |
| 847 | } else { |
| 848 | $oitar = 1; |
| 849 | } |
| 850 | ?> |
| 851 | |
| Line | Code |
| 976 | } else { |
| 977 | $cropped = get_attached_file( $attachment_id ); |
| 978 | } |
| 979 | |
| 980 | if ( ! $cropped || is_wp_error( $cropped ) ) { |
| 981 | wp_die( __( 'Image could not be processed. Please go back and try again.' ), __( 'Image Processing Error' ) ); |
| 982 | } |
| 983 | |
| 984 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 985 | $cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication. |
| 986 | |
| 987 | $object = $this->create_attachment_object( $cropped, $attachment_id ); |
| 988 | |
| 989 | if ( ! empty( $_POST['create-new-attachment'] ) ) { |
| 990 | unset( $object['ID'] ); |
| 991 | } |
| 992 | |
| 993 | // Update the attachment. |
| 994 | $attachment_id = $this->insert_attachment( $object, $cropped ); |
| Line | Code |
| 1312 | (int) $dimensions['dst_width'], |
| 1313 | (int) $dimensions['dst_height'] |
| 1314 | ); |
| 1315 | |
| 1316 | if ( ! $cropped || is_wp_error( $cropped ) ) { |
| 1317 | wp_send_json_error( array( 'message' => __( 'Image could not be processed. Please go back and try again.' ) ) ); |
| 1318 | } |
| 1319 | |
| 1320 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 1321 | $cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication. |
| 1322 | |
| 1323 | $object = $this->create_attachment_object( $cropped, $attachment_id ); |
| 1324 | |
| 1325 | $previous = $this->get_previous_crop( $object ); |
| 1326 | |
| 1327 | if ( $previous ) { |
| 1328 | $object['ID'] = $previous; |
| 1329 | } else { |
| 1330 | unset( $object['ID'] ); |