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(PHP 5 >= 5.5.0, PHP 7, PHP 8)
mysqli::begin_transaction -- mysqli_begin_transaction — Starts a transaction
面向对象风格
$flags = 0, ?string $name = null): bool
过程化风格:
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.
mysql
仅以过程化样式：由mysqli_connect() 或 mysqli_init() 返回的 mysqli 对象。
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.
成功时返回 true， 或者在失败时返回 false。
| 版本 | 说明 |
|---|---|
| 8.0.0 |
name is now nullable.
|
示例 #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;
}
注意:
This function does not work with non transactional table types (like MyISAM or ISAM).
