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(PHP 7 >= 7.4.0, PHP 8)
SQLite3::backup — Backup one database to another database
$destination, string $sourceDatabase = "main", string $destinationDatabase = "main"): bool
SQLite3::backup() copies the contents of one database into another, overwriting the contents of the destination database. It is useful either for creating backups of databases or for copying in-memory databases to or from persistent files.
As of SQLite 3.27.0 (2019-02-07), it is also possible to use the statement
VACUUM INTO 'file.db'; to backup the database to a new file.
destination
A database connection opened with SQLite3::open().
sourceDatabase
The database name is "main" for the main database,
"temp" for the temporary database,
or the name specified after the AS keyword
in an ATTACH statement for an attached database.
destinationDatabase
Analogous to sourceDatabase
but for the destination.
成功时返回 true， 或者在失败时返回 false。
示例 #1 Backup an existing database
<?php
// $conn is a connection to an already opened sqlite3 database
$backup = new SQLite3('backup.sqlite');
$conn->backup($backup);
?>
