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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 2 times in this file.
| Line | Code |
|---|---|
| 3974 | // Delete the temporary cropped file, we don't need it. |
| 3975 | wp_delete_file( $cropped ); |
| 3976 | |
| 3977 | // Additional sizes in wp_prepare_attachment_for_js(). |
| 3978 | add_filter( 'image_size_names_choose', array( $wp_site_icon, 'additional_sizes' ) ); |
| 3979 | break; |
| 3980 | } |
| 3981 | |
| 3982 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 3983 | $cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication. |
| 3984 | $attachment = $wp_site_icon->create_attachment_object( $cropped, $attachment_id ); |
| 3985 | unset( $attachment['ID'] ); |
| 3986 | |
| 3987 | // Update the attachment. |
| 3988 | add_filter( 'intermediate_image_sizes_advanced', array( $wp_site_icon, 'additional_sizes' ) ); |
| 3989 | $attachment_id = $wp_site_icon->insert_attachment( $attachment, $cropped ); |
| 3990 | remove_filter( 'intermediate_image_sizes_advanced', array( $wp_site_icon, 'additional_sizes' ) ); |
| 3991 | |
| 3992 | // Additional sizes in wp_prepare_attachment_for_js(). |
| Line | Code |
| 4002 | * @since 4.3.0 |
| 4003 | * |
| 4004 | * @param string $context The Customizer control requesting the cropped image. |
| 4005 | * @param int $attachment_id The attachment ID of the original image. |
| 4006 | * @param string $cropped Path to the cropped image file. |
| 4007 | */ |
| 4008 | do_action( 'wp_ajax_crop_image_pre_save', $context, $attachment_id, $cropped ); |
| 4009 | |
| 4010 | /** This filter is documented in wp-admin/includes/class-custom-image-header.php */ |
| 4011 | $cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication. |
| 4012 | |
| 4013 | $parent_url = wp_get_attachment_url( $attachment_id ); |
| 4014 | $parent_basename = wp_basename( $parent_url ); |
| 4015 | $url = str_replace( $parent_basename, wp_basename( $cropped ), $parent_url ); |
| 4016 | |
| 4017 | $size = wp_getimagesize( $cropped ); |
| 4018 | $image_type = ( $size ) ? $size['mime'] : 'image/jpeg'; |
| 4019 | |
| 4020 | // Get the original image's post to pre-populate the cropped image. |