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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 |
|---|---|
| 3629 | // Delete the temporary cropped file, we don't need it. |
| 3630 | wp_delete_file( $cropped ); |
| 3631 | |
| 3632 | // Additional sizes in wp_prepare_attachment_for_js(). |
| 3633 | add_filter( 'image_size_names_choose', array( $wp_site_icon, 'additional_sizes' ) ); |
| 3634 | break; |
| 3635 | } |
| 3636 | |
| 3637 | /** This filter is documented in wp-admin/custom-header.php */ |
| 3638 | $cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication. |
| 3639 | $object = $wp_site_icon->create_attachment_object( $cropped, $attachment_id ); |
| 3640 | unset( $object['ID'] ); |
| 3641 | |
| 3642 | // Update the attachment. |
| 3643 | add_filter( 'intermediate_image_sizes_advanced', array( $wp_site_icon, 'additional_sizes' ) ); |
| 3644 | $attachment_id = $wp_site_icon->insert_attachment( $object, $cropped ); |
| 3645 | remove_filter( 'intermediate_image_sizes_advanced', array( $wp_site_icon, 'additional_sizes' ) ); |
| 3646 | |
| 3647 | // Additional sizes in wp_prepare_attachment_for_js(). |
| Line | Code |
| 3657 | * @since 4.3.0 |
| 3658 | * |
| 3659 | * @param string $context The Customizer control requesting the cropped image. |
| 3660 | * @param int $attachment_id The attachment ID of the original image. |
| 3661 | * @param string $cropped Path to the cropped image file. |
| 3662 | */ |
| 3663 | do_action( 'wp_ajax_crop_image_pre_save', $context, $attachment_id, $cropped ); |
| 3664 | |
| 3665 | /** This filter is documented in wp-admin/custom-header.php */ |
| 3666 | $cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication. |
| 3667 | |
| 3668 | $parent_url = wp_get_attachment_url( $attachment_id ); |
| 3669 | $url = str_replace( wp_basename( $parent_url ), wp_basename( $cropped ), $parent_url ); |
| 3670 | |
| 3671 | $size = @getimagesize( $cropped ); |
| 3672 | $image_type = ( $size ) ? $size['mime'] : 'image/jpeg'; |
| 3673 | |
| 3674 | $object = array( |
| 3675 | 'post_title' => wp_basename( $cropped ), |