WP_Filesystem_Direct::delete( string $file, bool $recursive = false, string|false $type = false ): bool

373	public function delete( $file, $recursive = false, $type = false ) {374		if ( empty( $file ) ) {375			// Some filesystems report this as /, which can cause non-expected recursive deletion of all files in the filesystem.376			return false;377		}378 379		$file = str_replace( '\\', '/', $file ); // For Win32, occasional problems deleting files otherwise.380 381		if ( 'f' === $type || $this->is_file( $file ) ) {382			return @unlink( $file );383		}384 385		if ( ! $recursive && $this->is_dir( $file ) ) {386			return @rmdir( $file );387		}388 389		// At this point it's a folder, and we're in recursive mode.390		$file     = trailingslashit( $file );391		$filelist = $this->dirlist( $file, true );392 393		$retval = true;394 395		if ( is_array( $filelist ) ) {396			foreach ( $filelist as $filename => $fileinfo ) {397				if ( ! $this->delete( $file . $filename, $recursive, $fileinfo['type'] ) ) {398					$retval = false;399				}400			}401		}402 403		if ( file_exists( $file ) && ! @rmdir( $file ) ) {404			$retval = false;405		}406 407		return $retval;408	}