Php/docs/mysqli.rollback
mysqli::rollback
mysqli_rollback
(PHP 5, PHP 7)
mysqli::rollback -- mysqli_rollback — 回退当前事务
返回值
成功时返回 true， 或者在失败时返回 false。
范例
Example #1 mysqli::rollback() example
面向对象风格
<?php$mysqli = new mysqli("localhost", "my_user", "my_password", "world");/* check connection */if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit();}/* disable autocommit */$mysqli->autocommit(FALSE);$mysqli->query("CREATE TABLE myCity LIKE City");$mysqli->query("ALTER TABLE myCity Type=InnoDB");$mysqli->query("INSERT INTO myCity SELECT * FROM City LIMIT 50");/* commit insert */$mysqli->commit();/* delete all rows */$mysqli->query("DELETE FROM myCity");if ($result = $mysqli->query("SELECT COUNT(*) FROM myCity")) { $row = $result->fetch_row(); printf("%d rows in table myCity.\n", $row[0]); /* Free result */ $result->close();}/* Rollback */$mysqli->rollback();if ($result = $mysqli->query("SELECT COUNT(*) FROM myCity")) { $row = $result->fetch_row(); printf("%d rows in table myCity (after rollback).\n", $row[0]); /* Free result */ $result->close();}/* Drop table myCity */$mysqli->query("DROP TABLE myCity");$mysqli->close();?>
过程化风格
<?php$link = mysqli_connect("localhost", "my_user", "my_password", "world");/* check connection */if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit();}/* disable autocommit */mysqli_autocommit($link, FALSE);mysqli_query($link, "CREATE TABLE myCity LIKE City");mysqli_query($link, "ALTER TABLE myCity Type=InnoDB");mysqli_query($link, "INSERT INTO myCity SELECT * FROM City LIMIT 50");/* commit insert */mysqli_commit($link);/* delete all rows */mysqli_query($link, "DELETE FROM myCity");if ($result = mysqli_query($link, "SELECT COUNT(*) FROM myCity")) { $row = mysqli_fetch_row($result); printf("%d rows in table myCity.\n", $row[0]); /* Free result */ mysqli_free_result($result);}/* Rollback */mysqli_rollback($link);if ($result = mysqli_query($link, "SELECT COUNT(*) FROM myCity")) { $row = mysqli_fetch_row($result); printf("%d rows in table myCity (after rollback).\n", $row[0]); /* Free result */ mysqli_free_result($result);}/* Drop table myCity */mysqli_query($link, "DROP TABLE myCity");mysqli_close($link);?>
以上例程会输出：
0 rows in table myCity. 50 rows in table myCity (after rollback).
