PDO for PHP

: This article mainly introduces the PDO of PHP. if you are interested in the PHP Tutorial, you can refer to it.

The PHP Data object (PDO) extension defines a lightweight consistent interface for PHP to access the database.

  query($sql) or var_dump($pdo->errorInfo());        // var_dump($res);$mon = $res->fetch(PDO::FETCH_ASSOC);        echo$mon['goods_price'];    } catch (PDOException $e) {        echo$e->getMessage();    } ?>

PDO operation transaction

// Start beginTransacition () // roll back rollback () // submit commit () // Determine whether the transaction is in inTransaction ()

Returns the ID of the last inserted row.
PDO: lastInsertID ()

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Exec () execution
Compared with query (), exec () returns the number of affected rows.

$ SQL = "insert into table values ('$ val')"; if (false ===$ pdo-> exec ($ SQL) {echo 'execution failed ';}

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The above describes the PDO of PHP, including some content, and hope to help those who are interested in PHP tutorials.