(PECL sam >= 0.1.0)
SAMConnection::commit — Commits (completes) the current unit of work.
Calling the "commit" method on a Connection object commits (completes) all in-flight transactions that are part of the current unit of work.
   This method returns FALSE if an error occurs.
  
Example #1 Committing the current unit of work
<?php
  if (!$conn->commit()) {
    // The commit failed!
    echo "Commit failed ($conn->errno) $conn->error";
  }
?>