BackupFile::getContents in core/includes/backup/backup.file.inc

Read the entire contents of the file.

BackupFile::getFileSize in core/includes/backup/backup.file.inc

Get the file size.

BackupFile::open in core/includes/backup/backup.file.inc

Open a file for reading or writing.

BackupFile::putContents in core/includes/backup/backup.file.inc

Write the entire contents of the file.