(PECL mysqlnd-uh >= 1.0.1-alpha, PHP >= 5.4.0)
MysqlndUhConnection::setAutocommit — Turns on or off auto-committing database modifications
$connection
   , int $mode
   )Turns on or off auto-committing database modifications
connectionMysqlnd connection handle. Do not modify!
modeWhether to turn on auto-commit or not.
   Returns TRUE on success.
   Otherwise, returns FALSE
  
Example #1 MysqlndUhConnection::setAutocommit() example
<?php
class proxy extends MysqlndUhConnection {
 public function setAutocommit($res, $mode) {
  printf("%s(%s)\n", __METHOD__, var_export(func_get_args(), true));
  $ret = parent::setAutocommit($res, $mode);
  printf("%s returns %s\n", __METHOD__, var_export($ret, true));
  return $ret;
 }
}
mysqlnd_uh_set_connection_proxy(new proxy());
$mysqli = new mysqli("localhost", "root", "", "test");
$mysqli->autocommit(false);
$mysqli->autocommit(true);
?>
The above example will output:
proxy::setAutocommit(array ( 0 => NULL, 1 => 0, )) proxy::setAutocommit returns true proxy::setAutocommit(array ( 0 => NULL, 1 => 1, )) proxy::setAutocommit returns true