(PHP 5, PHP 7 < 7.4.0)
ibase_commit — Commit a transaction
$link_or_trans_identifier = null): boolCommits a transaction.
link_or_trans_identifierIf called without an argument, this function commits the default transaction of the default link. If the argument is a connection identifier, the default transaction of the corresponding connection will be committed. If the argument is a transaction identifier, the corresponding transaction will be committed.
成功时返回 true， 或者在失败时返回 false。