我正在试图弄清楚如何在mysqli预处理语句中使用sql事务。我无法找到任何使用多个预准备语句(不是OO)的示例,因此我不确定如何使用它们进行事务处理。 这是我能想到的最接近的数字:
mysqli_autocommit($database, FALSE);
$transferq = 'INSERT INTO money (user_id, bank, onhand, type, amount, source) VALUES (?, ?, ?, ?, ?, ?)';
$transferstmt = mysqli_stmt_init($database);
mysqli_stmt_prepare($transferstmt, $transferq);
mysqli_stmt_bind_param($transferstmt, 'iiisis', $userid, $newbank, $newmoney, $type, $amount, $source);
mysqli_stmt_execute($transferstmt);
$insertq = 'UPDATE users SET money=?, bank=? WHERE user_id=' . $userid . ' LIMIT 1';
$insertstmt = mysqli_stmt_init($database);
mysqli_stmt_prepare($insertstmt, $insertq);
mysqli_stmt_bind_param($insertstmt, 'ii', $newmoney, $newbank);
mysqli_stmt_execute($insertstmt);
mysqli_commit($database);
但是,我不知道这是否会奏效。但是,我最大的问题是我不确定如何检查查询是否失败(因此是否提交)。我看到了一个我觉得像
这样的例子if(mysqli_stmt_execute($stmt)){
mysqli_commit($database);
}else{
mysqli_rollback($database);
}
但我真的不能这样做,因为我有多个准备好的语句要执行。
这应该如何运作?
答案 0 :(得分:1)
也许我不明白你的问题,但是这个怎么样?
mysqli_autocommit($database, FALSE);
$transferq = 'INSERT INTO money (user_id, bank, onhand, type, amount, source) VALUES (?, ?, ?, ?, ?, ?)';
$transferstmt = mysqli_stmt_init($database);
mysqli_stmt_prepare($transferstmt, $transferq);
mysqli_stmt_bind_param($transferstmt, 'iiisis', $userid, $newbank, $newmoney, $type, $amount, $source);
if (not mysqli_stmt_execute($transferstmt) ){
mysqli_rollback($database);
return;
}
$insertq = 'UPDATE users SET money=?, bank=? WHERE user_id=' . $userid . ' LIMIT 1';
$insertstmt = mysqli_stmt_init($database);
mysqli_stmt_prepare($insertstmt, $insertq);
mysqli_stmt_bind_param($insertstmt, 'ii', $newmoney, $newbank);
if (not mysqli_stmt_execute($insertstmt) ){
mysqli_rollback($database);
return;
}
mysqli_commit($database);
如果使用mysqli或PDO这种面向对象的形式(没有事务,作为数据库工作方式的示例)的下一级:
class my_database{
private static $inner_link_to_driver;
protected static function factory( ){
if (not static::$inner_link_to_driver){
static::$inner_link_to_driver = new ...(USER, SERVER, PASSWD, PORT);
}
return static::$inner_link_to_driver;
}
public static function do_something($params, &$message ){
$query = "...";
$stmt = static::factory()->prepare($query);
if (not $stmp ){
$message = 'Error prepare query '.$query.PHP_EOL.static::factory()-> ..(get_error);
return FALSE;
}
if (not $stmt->execute($params) ){
$message = 'Error execute query '.$query.PHP_EOL.static::factory()-> ..(get_error);
return FALSE;
}
return TRUE;
}
}