## 执行SQL命令 >### PDO::query ( string $statement ) ### PDO::query ( string $statement [, int $PDO::FETCH_CLASS, string $classname] , [array $ctorargs ]) *例子* ~~~ $dbh = new PDO('mysql:host=localhost;dbname=test', $user, $pass); foreach($dbh->query('SELECT * from table') as $row) { print_r($row); } ~~~