Handles an Image upload for the background image.

File: wp-admin/includes/class-custom-background.php. View all references

public function handle_upload() {
	if ( empty( $_FILES ) ) {
		return;
	}

	check_admin_referer( 'custom-background-upload', '_wpnonce-custom-background-upload' );

	$overrides = array( 'test_form' => false );

	$uploaded_file = $_FILES['import'];
	$wp_filetype   = wp_check_filetype_and_ext( $uploaded_file['tmp_name'], $uploaded_file['name'] );
	if ( ! wp_match_mime_types( 'image', $wp_filetype['type'] ) ) {
		wp_die( __( 'The uploaded file is not a valid image. Please try again.' ) );
	}

	$file = wp_handle_upload( $uploaded_file, $overrides );

	if ( isset( $file['error'] ) ) {
		wp_die( $file['error'] );
	}

	$url      = $file['url'];
	$type     = $file['type'];
	$file     = $file['file'];
	$filename = wp_basename( $file );

	// Construct the attachment array.
	$attachment = array(
		'post_title'     => $filename,
		'post_content'   => $url,
		'post_mime_type' => $type,
		'guid'           => $url,
		'context'        => 'custom-background',
	);

	// Save the data.
	$id = wp_insert_attachment( $attachment, $file );

	// Add the metadata.
	wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $file ) );
	update_post_meta( $id, '_wp_attachment_is_custom_background', get_option( 'stylesheet' ) );

	set_theme_mod( 'background_image', sanitize_url( $url ) );

	$thumbnail = wp_get_attachment_image_src( $id, 'thumbnail' );
	set_theme_mod( 'background_image_thumb', sanitize_url( $thumbnail[0] ) );

	/** This action is documented in wp-admin/includes/class-custom-image-header.php */
	do_action( 'wp_create_file_in_uploads', $file, $id ); // For replication.
	$this->updated = true;
}