(PHP 5 >= 5.3.0, PHP 7)
实现与 SQLite 3 数据库对接的类。
$filename
   [, int $flags = SQLITE3_OPEN_READWRITE | SQLITE3_OPEN_CREATE
   [, string $encryption_key = null
  ]] )$name
   , mixed $step_callback
   , mixed $final_callback
   [, int $argument_count = -1
  ] )$filename
   [, int $flags = SQLITE3_OPEN_READWRITE | SQLITE3_OPEN_CREATE
   [, string $encryption_key = null
  ]] )