ezpdo也有事务处理了，可以支持自动事务回滚和手工回滚
首先看自动回滚的事务

// 获得 EZPDO管理器
$m = epManager:: instance ( );
 

$os = $m-> find ( "from SomeClass as c where c.var = 'x'" );
if (! $os ) {
  echo "no object found\n";
  exit (- 1 );
}
 
$o = $os [ 0 ];
 
//用start_t()开始事务
$m-> start_t ( );
 
// 改变值了
$o-> var = 'y';
 
// 结束事务提交
$m-> commit_t ( ); // by default: auto-rollback
 
另外是需要用try catch的，手工来回滚
// get the EZPDO manager
$m = epManager:: instance ( );
 
// find an object using EZOQL
$os = $m-> find ( "from SomeClass as c where c.var = 'x'" );
if (! $os ) {
  echo "no object found\n";
  exit (- 1 );
}
 
$o = $os [ 0 ];
 
// call manager to start transaction
$m-> start_t ( );
try {
 
  // change the value of var in object
  $o-> var = 'y';
 
  // end transaction and save changed objects
  $m-> commit_t ( false ); // false: no auto rollback
 
}
catch (Exception $e ) {
 
  // something wrong. rollback to old values
  $m-> rollback_t ( );
 
  // do something here
  // ......
}
 
// 'y' if transaction successful; 'x' if failed.
echo $o-> var;