(PECL mysqlnd-uh >= 1.0.1-alpha, PHP >= 5.4.0)
MysqlndUhConnection::txRollback — Rolls back current transaction
$connection
   )Rolls back current transaction.
connectionMysqlnd connection handle. Do not modify!
   Returns TRUE on success.
   Otherwise, returns FALSE
  
Example #1 MysqlndUhConnection::txRollback() example
<?php
class proxy extends MysqlndUhConnection {
 public function txRollback($res) {
  printf("%s(%s)\n", __METHOD__, var_export(func_get_args(), true));
  $ret = parent::txRollback($res);
  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->rollback();
?>
The above example will output:
proxy::txRollback(array ( 0 => NULL, )) proxy::txRollback returns true