開始交易沒有定義

Question

開始交易在mysql中是未定義的。我實際上使用它來在我的代碼中運行多個查詢來將一行從一個表移動到另一個表。很多幫助將不勝感激。好吧，我的問題是，爲什麼我的Begin_transaction（）沒有定義？

<?php 
    If(isset($trade_id)){ 
      $trade_id= $_GET['trade_id']; 
    } 
    require_once('connect.php'); 
    $mysqli = new mysqli($database_hostname, $database_username, $database_password, $database_name) or exit("Error connecting to database"); 
    try { 
     // First of all, let's begin a transaction 
     $mysqli->begin_transaction(); 

     // A set of queries; if one fails, an exception should be thrown 
     $mysqli->query("INSERT INTO `trade_history1` (session_id, trade_id, selection, date, type, size, bidprice, offerprice, stoploss, takeprofit, profitandloss, dateclose, close) 
     SELECT session_id, trade_id, selection, date, type, size, bidprice, offerprice, stoploss, takeprofit, profitandloss, dateclose, close 
     FROM `opentrades` 
     WHERE `trade_id` = " . $tradeid); 
     $mysqli->query("DELETE FROM `opentrades` WHERE `trade_id` = " . $trade_id); 

     // If we arrive here, it means that no exception was thrown 
     // i.e. no query has failed, and we can commit the transaction 
     $mysqli->commit(); 
     $_SESSION['message'] = 'Successfully deleted'; 
    } catch (Exception $e) { 
     // An exception has been thrown 
     // We must rollback the transaction 
     $_SESSION['message'] = 'Unable to delete'; 
     $mysqli->rollback(); 
    } 
    $mysqli->close(); 

      // if we successfully delete this, we 
      if ($successfullyDeleted) { 
       $_SESSION['message'] = 'Successfully deleted'; 
      } else { 
       $_SESSION['message'] = 'Unable to delete'; 
      } 

      header('Location: js.php'); 

    ?> 

Answer 1

$mysqli->begin_transaction();必須$mysqli->autocommit(FALSE);

入住這

http://www.php.net/manual/en/mysqli.commit.php

Answer 2

PHP Manual說：的mysqli :: begin_transaction需要PHP版本5.5.0或上（http://php.net/manual/en/mysqli.begin-transaction.php）。

但是你可以使用的mysqli ::自動提交代替（http://php.net/manual/en/mysqli.autocommit.php）與PHP 5.x的：

//Begin transaction 
$mysqli->autocommit(FALSE); 
... 
//End transaction and auto commit 
$mysqli->autocommit(TRUE); 

Answer 3

您可以使用此代碼我已經測試。

面向對象的風格

$cid->multi_query('start transaction;'); 
$cid->multi_query("insert into demo values('1','Pankaj','9031251290')"); 
$cid->multi_query('commit;'); 

程序風格

mysqli_query($link, "start transaction;"); 
mysqli_query($link, "INSERT INTO Language VALUES ('DEU', 'Bavarian', 'F', 11.2)"); 
mysqli_query($link, "commit;");