Question

代码：

$new_deb = 5; 
//prepare query(); 
$q = 'START TRANSACTION;'; 
for($l = 0; $l < $cond; $l++){ 
    if($uploaded == 0 || $uploaded == "0"){ 
     $q .= ' INSERT INTO vocher (`vo_type_id`, `account_id`, `value`, `desc`, `user_id`, `status_id`, `date`, `debtor_id`)'; 
     $q .= ' VALUES ("'.$vouchertype.'", "'.$voucheracc[$l].'","'.$vdebvalue[$l].'", "'.$vdebdesc[$l].'","'.$_POST['usrSes'].'", "'.$status.'","'.$vocherdate[$l].'", "'.$new_deb.'");'; 
    }else{ 
     $q .= ' INSERT INTO vocher (`vo_type_id`, `account_id`, `value`, `desc`, `user_id`, `status_id`, `date`, `debtor_id`, `link`)'; 
     $q .= ' VALUES ("'.$vouchertype.'", "'.$voucheracc[$l].'","'.$vdebvalue[$l].'", "'.$vdebdesc[$l].'","'.$_POST['usrSes'].'", "'.$status.'","'.$vocherdate[$l].'", "'.$new_deb.'", "'.$newAttach.'");'; 
    } 

    $q .= ' SET @lastId = (SELECT `id` FROM vocher ORDER BY `id` DESC LIMIT 1);'; 
    if($voCc[$l] != 'e'){ 
     for($h = 0; $h < count($voCc[$l]); $h++){ 
      if($voCc[$l][$h] != 'e'){ 
       $q .= ' INSERT INTO voucher_cc (`voucher`, `cc`) VALUES (@lastId, "'.$voCc[$l][$h].'");'; 
      } 
     } 
    } 

    if(in_array($voucheracc[$l], $inResetAccs)){ 
     $q .= ' INSERT INTO resets (`type`, `acc`, `user`, `value`, `desc`, `debtor_id`, `date`, `status`)'; 
     $q .= ' VALUES ("IN", "'.$voucheracc[$l].'", "'.$_POST['usrSes'].'", "'.$vdebvalue[$l].'", "'.$vdebdesc[$l].'", "'.$new_deb.'", "'.$vocherdate[$l].'", "1");'; 
    } 
} 

for($z = 0; $z < $chqradiolength; $z++){ 
    if ($chqradio[$z] == "0") { 
     $q .= ' INSERT INTO creditor (`acc_id`, `value`, `bank_id`, `debtor_id`, `cheque_no`, `issue_date`, `available_date`, `vo_type_id`, `desc`, `date`, `user`)'; 
     $q .= ' VALUES ("'.$chequeAcc[$z].'", "'.$vvalue[$z].'", "'.$banks[$z].'", "'.$new_deb.'", "'.$vsn[$z].'", "'.$issuesdates[$z].'", "'.$availabledate[$z].'", "'.$vouchertype.'", "'.$vdesc[$z].'", "'.$credates[$z].'", "'.$_POST['usrSes'].'");'; 
     $q .= ' SET @creLastId = (SELECT `id` FROM creditor ORDER BY `id` DESC LIMIT 1);'; 
     for($x = 0; $x < count($chequeCc[$z]); $x++){ 
      $q .= ' INSERT INTO creditor_cc (`creditor`, `cc`) VALUES (@creLastId, "'.$chequeCc[$z][$x].'");'; 
     } 
    }else{ 
     $q .= ' INSERT INTO creditor (`acc_id`, `value`, `debtor_id`, `date`, `desc`, `vo_type_id`, `user`)'; 
     $q .= ' VALUES ("'.$creaccs[$z].'", "'.$vvalue[$z].'", "'.$new_deb.'" , "'.$credates[$z].'" , "'.$vdesc[$z].'" , "'.$vouchertype.'", "'.$_POST['usrSes'].'");'; 
     $q .= ' SET @creLastId = (SELECT `id` FROM creditor ORDER BY `id` DESC LIMIT 1);'; 

     if($creCc[$z] != 'e'){ 
      for($x = 0; $x < count($creCc[$z]); $x++){ 
       if($creCc[$z][$x] != 'e'){ 
        $q .= ' INSERT INTO creditor_cc (`creditor`, `cc`) VALUES (@creLastId, "'.$creCc[$z][$x].'");'; 
       } 
      } 
     } 

     if(in_array($creaccs[$z], $outResetAccs)){ 
      $q .= ' INSERT INTO resets (`type`, `acc`, `user`, `value`, `desc`, `debtor_id`, `date`, `status`)'; 
      $q .= ' VALUES ("OUT", "'.$creaccs[$z].'" , "'.$_POST['usrSes'].'" , "'.$vvalue[$z].'", "'.$vdesc[$z].'" , "'.$new_deb.'", "'.$credates[$z].'", "1");'; 
     } 
    } 
} 
$q .= ' COMMIT;'; 
$vocher_obj->query($q); 
$check = $vocher_obj->execute(); 
if($check){ 
    $res = 1; 
}else{ 
    $res = 23; 
} 

echo $res; 

此代码是产生了一些疑问。

即使我将表名更改为数据库中的“不存在”表，但它应该返回“false”，那些查询总是返回“true”！

你能帮我解决吗？

Answer 1

这也许是受到此问题的原因包括：https://bugs.php.net/bug.php?id=61613

它说，如果第一个语句有效，PDO将不会返回一个错误。并且START TRANSACTION;始终有效。

该错误报告为未定义的 upto verison 5.6.7的PHP。

不确定这个bug是否也会影响return语句，因为它是关于丢失异常抛出的。但应该很容易测试：在其他任何地方之前添加一个无效的语句，并查看返回值是否为假。

而且与PDO交易你应该看看

$pdo->beginTransaction(); 
$pdo->commit(); 
$pdo->rollback(); 

要避免上述错误，收起你的查询到一个数组，像这样运行它们（简体）：

function runQueries($pdo, $queries){ 
    try{ 
    $pdo->beginTransaction(); 
    foreach($queries as $q){ 
     $pdo->exec($q); 
    } 
    $pdo->commit(); 
    return true; 
    }catch (PDOException $e){ 
    $pdo->rollback(); 
    return false; 
    } 
} 

OFC。你需要配置PDO抛出错误，使用

$pdo = new PDO('mysql:host=localhost;dbname=someDB', 'username', 'password', array(
    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION 
));