如何在 php pdo 语句中捕获确切的 sql 错误
How to catch exact sql error in php pdo statement
我是 pdo 的新手,因为我刚刚从传统的查询方法转向它。以下是我写的并且有效。我现在担心的是,如果 select、insert 或 update 中的任何查询有任何错误,它们都会被那个 catch 捕获,但我无法准确指出错误。那么多次尝试和捕捉是否是正确的方向?
try {
$dsn = 'mysql:dbname='.dbDatabase.';host='.dbHost;
$link = new PDO($dsn, dbUser, dbPassword );
$link->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $pe) {
die("Could not connect to the database $dbname :" . $pe->getMessage());
}
$link->beginTransaction();
$rollBackStatus="False";
try
{
$selectQuery1 ="Select ......";
$selectQueryResult1 = $link->prepare($selectQuery1);
$selectQueryResult1->bindParam(':uname', $userName);
$selectQueryResult1->execute();
$n1=$selectQueryResult1->rowCount();
//echo "TEST : ".$n1;
if($n1==1)
{
$row1 = $selectQueryResult1->fetch();
$userID=$row1['userID'];
if($row1['up']==$up){
$insertQuery1 ="Insert .......... ".
$insertQueryResult1 = $link->prepare($insertQuery1);
$insertQueryResult1->bindParam(':uID', $userID);
$insertQueryResult1->bindParam(':uIP', $userIP);
if($insertQueryResult1->execute()){
}
else{
$rollBackStatus="True";
$link->rollback();
}
$updateQuery1 ="Update ........ ";
$updateQueryResult1 = $link->prepare($updateQuery1);
$updateQueryResult1->bindParam(':uID', $userID);
if($updateQueryResult1->execute()){
}
else{
$rollBackStatus="True";
$link->rollback();
}
}
}
catch(PDOException $pe)
{
$rollBackStatus="True";
die("Error in selectQuery1 :" . $pe->getMessage());
$link->rollback();
}
if($rollBackStatus=="False"){
$link->commit();
$link=null;
if($headerSent!="")
{
header($headerSent);
}
}
您可以使用以下方法在执行查询后检查任何错误。
$selectQueryResult1->execute();
$arr = $selectQueryResult1->errorInfo();
print_r($arr);
我是 pdo 的新手,因为我刚刚从传统的查询方法转向它。以下是我写的并且有效。我现在担心的是,如果 select、insert 或 update 中的任何查询有任何错误,它们都会被那个 catch 捕获,但我无法准确指出错误。那么多次尝试和捕捉是否是正确的方向?
try {
$dsn = 'mysql:dbname='.dbDatabase.';host='.dbHost;
$link = new PDO($dsn, dbUser, dbPassword );
$link->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $pe) {
die("Could not connect to the database $dbname :" . $pe->getMessage());
}
$link->beginTransaction();
$rollBackStatus="False";
try
{
$selectQuery1 ="Select ......";
$selectQueryResult1 = $link->prepare($selectQuery1);
$selectQueryResult1->bindParam(':uname', $userName);
$selectQueryResult1->execute();
$n1=$selectQueryResult1->rowCount();
//echo "TEST : ".$n1;
if($n1==1)
{
$row1 = $selectQueryResult1->fetch();
$userID=$row1['userID'];
if($row1['up']==$up){
$insertQuery1 ="Insert .......... ".
$insertQueryResult1 = $link->prepare($insertQuery1);
$insertQueryResult1->bindParam(':uID', $userID);
$insertQueryResult1->bindParam(':uIP', $userIP);
if($insertQueryResult1->execute()){
}
else{
$rollBackStatus="True";
$link->rollback();
}
$updateQuery1 ="Update ........ ";
$updateQueryResult1 = $link->prepare($updateQuery1);
$updateQueryResult1->bindParam(':uID', $userID);
if($updateQueryResult1->execute()){
}
else{
$rollBackStatus="True";
$link->rollback();
}
}
}
catch(PDOException $pe)
{
$rollBackStatus="True";
die("Error in selectQuery1 :" . $pe->getMessage());
$link->rollback();
}
if($rollBackStatus=="False"){
$link->commit();
$link=null;
if($headerSent!="")
{
header($headerSent);
}
}
您可以使用以下方法在执行查询后检查任何错误。
$selectQueryResult1->execute();
$arr = $selectQueryResult1->errorInfo();
print_r($arr);