This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

_wp_delete_all_temp_backups()

Deletes all contents in the temporary backup directory.

Return

(void|WP_Error) Void on success, or a WP_Error object on failure.

Source

File: wp-includes/update.php

function _wp_delete_all_temp_backups() {
	global $wp_filesystem;

	if ( ! $wp_filesystem ) {
		require_once ABSPATH . '/wp-admin/includes/file.php';
		WP_Filesystem();
	}

	if ( ! $wp_filesystem->wp_content_dir() ) {
		return new WP_Error( 'fs_no_content_dir', __( 'Unable to locate WordPress content directory (wp-content).' ) );
	}

	$temp_backup_dir = $wp_filesystem->wp_content_dir() . 'upgrade-temp-backup/';
	$dirlist         = $wp_filesystem->dirlist( $temp_backup_dir );
	$dirlist         = $dirlist ? $dirlist : array();

	foreach ( array_keys( $dirlist ) as $dir ) {
		if ( '.' === $dir || '..' === $dir ) {
			continue;
		}

		$wp_filesystem->delete( $temp_backup_dir . $dir, true );
	}
}

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Changelog

Changelog
Version	Description
6.3.0	Introduced.