Php/docs/mysqli.begin-transaction
mysqli::begin_transaction
mysqli_begin_transaction
(PHP 5 >= 5.5.0, PHP 7)
mysqli::begin_transaction -- mysqli_begin_transaction — Starts a transaction
说明
面向对象风格
public mysqli::begin_transaction
([ int $flags = 0
[, string $name
]] ) : bool
过程化风格:
mysqli_begin_transaction
( mysqli $link
[, int $flags = 0
[, string $name
]] ) : bool
Begins a transaction. Requires the InnoDB engine (it is enabled by default). For additional details about how MySQL transactions work, see » http://dev.mysql.com/doc/mysql/en/commit.html.
参数
link- 仅以过程化样式：由mysqli_connect() 或 mysqli_init() 返回的链接标识。
flags- Valid flags are:
MYSQLI_TRANS_START_READ_ONLY- Start the transaction as "START TRANSACTION READ ONLY". Requires MySQL 5.6 and above.
MYSQLI_TRANS_START_READ_WRITE: Start the transaction as "START TRANSACTION READ WRITE". Requires MySQL 5.6 and above.MYSQLI_TRANS_START_WITH_CONSISTENT_SNAPSHOT: Start the transaction as "START TRANSACTION WITH CONSISTENT SNAPSHOT".
name- Savepoint name for the transaction.
返回值
成功时返回 true， 或者在失败时返回 false。
注释
Note:
This function does not work with non transactional table types (like MyISAM or ISAM).
范例
Example #1 mysqli::begin_transaction() example
面向对象风格
<?php/* Tell mysqli to throw an exception if an error occurs */mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);$mysqli = new mysqli("localhost", "my_user", "my_password", "world");/* The table engine has to support transactions */$mysqli->query("CREATE TABLE IF NOT EXISTS language ( Code text NOT NULL, Speakers int(11) NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");/* Start transaction */$mysqli->begin_transaction();try { /* Insert some values */ $mysqli->query("INSERT INTO language(Code, Speakers) VALUES ('DE', 42000123)"); /* Try to insert invalid values */ $language_code = 'FR'; $native_speakers = 'Unknown'; $stmt = $mysqli->prepare('INSERT INTO language(Code, Speakers) VALUES (?,?)'); $stmt->bind_param('ss', $language_code, $native_speakers); $stmt->execute(); /* If code reaches this point without errors then commit the data in the database */ $mysqli->commit();} catch (mysqli_sql_exception $exception) { $mysqli->rollback(); throw $exception;}
过程化风格
<?php/* Tell mysqli to throw an exception if an error occurs */mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);$mysqli = mysqli_connect("localhost", "my_user", "my_password", "world");/* The table engine has to support transactions */mysqli_query($mysqli, "CREATE TABLE IF NOT EXISTS language ( Code text NOT NULL, Speakers int(11) NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");/* Start transaction */mysqli_begin_transaction($mysqli);try { /* Insert some values */ mysqli_query($mysqli, "INSERT INTO language(Code, Speakers) VALUES ('DE', 42000123)"); /* Try to insert invalid values */ $language_code = 'FR'; $native_speakers = 'Unknown'; $stmt = mysqli_prepare($mysqli, 'INSERT INTO language(Code, Speakers) VALUES (?,?)'); mysqli_stmt_bind_param($stmt, 'ss', $language_code, $native_speakers); mysqli_stmt_execute($stmt); /* If code reaches this point without errors then commit the data in the database */ mysqli_commit($mysqli);} catch (mysqli_sql_exception $exception) { mysqli_rollback($mysqli); throw $exception;}
参见
- mysqli_autocommit() - 打开或关闭本次数据库连接的自动命令提交事务模式
- mysqli_commit() - 提交一个事务
- mysqli_rollback() - 回退当前事务
