支持多个查询的 PDO (PDO_MYSQL，PDO_MYSQLND)

小开

最佳答案

As I know, PDO_MYSQLND replaced PDO_MYSQL in PHP 5.3. Confusing part is that name is still PDO_MYSQL. So now ND is default driver for MySQL+PDO.

Overall, to execute multiple queries at once you need:

PHP 5.3+
mysqlnd
Emulated prepared statements. Make sure PDO::ATTR_EMULATE_PREPARES is set to 1 (default). Alternatively you can avoid using prepared statements and use $pdo->exec directly.

Using exec

$db = new PDO("mysql:host=localhost;dbname=test", 'root', '');


// works regardless of statements emulation
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, 0);


$sql = "
DELETE FROM car;
INSERT INTO car(name, type) VALUES ('car1', 'coupe');
INSERT INTO car(name, type) VALUES ('car2', 'coupe');
";


$db->exec($sql);

Using statements

$db = new PDO("mysql:host=localhost;dbname=test", 'root', '');


// works not with the following set to 0. You can comment this line as 1 is default
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, 1);


$sql = "
DELETE FROM car;
INSERT INTO car(name, type) VALUES ('car1', 'coupe');
INSERT INTO car(name, type) VALUES ('car2', 'coupe');
";


$stmt = $db->prepare($sql);
$stmt->execute();

A note:

When using emulated prepared statements, make sure you have set proper encoding (that reflects actual data encoding) in DSN (available since 5.3.6). Otherwise there can be a slight possibility for SQL injection if some odd encoding is used.

小开

Tried following code

 $db = new PDO("mysql:host={$dbhost};dbname={$dbname};charset=utf8", $dbuser, $dbpass, array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));

Then

 try {
$db->query('SET NAMES gbk');
$stmt = $db->prepare('SELECT * FROM 2_1_paidused WHERE NumberRenamed = ? LIMIT 1');
$stmt->execute(array("\xbf\x27 OR 1=1 /*"));
}
catch (PDOException $e){
echo "DataBase Errorz: " .$e->getMessage() .'<br>';
}
catch (Exception $e) {
echo "General Errorz: ".$e->getMessage() .'<br>';
}

And got

DataBase Errorz: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '/*' LIMIT 1' at line 1

If added $db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); after $db = ...

Then got blank page

If instead SELECT tried DELETE, then in both cases got error like

 DataBase Errorz: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '* FROM 2_1_paidused WHERE NumberRenamed = '¿\' OR 1=1 /*' LIMIT 1' at line 1

So my conclusion that no injection possible...

小开

After half a day of fiddling with this, found out that PDO had a bug where...

--

//This would run as expected:
$pdo->exec("valid-stmt1; valid-stmt2;");

--

//This would error out, as expected:
$pdo->exec("non-sense; valid-stmt1;");

--

//Here is the bug:
$pdo->exec("valid-stmt1; non-sense; valid-stmt3;");

It would execute the "valid-stmt1;", stop on "non-sense;" and never throw an error. Will not run the "valid-stmt3;", return true and lie that everything ran good.

I would expect it to error out on the "non-sense;" but it doesn't.

Here is where I found this info: Invalid PDO query does not return an error

Here is the bug: https://bugs.php.net/bug.php?id=61613

So, I tried doing this with mysqli and haven't really found any solid answer on how it works so I thought I's just leave it here for those who want to use it..

try{
// db connection
$mysqli = new mysqli("host", "user" , "password", "database");
if($mysqli->connect_errno){
throw new Exception("Connection Failed: [".$mysqli->connect_errno. "] : ".$mysqli->connect_error );
exit();
}


// read file.
// This file has multiple sql statements.
$file_sql = file_get_contents("filename.sql");


if($file_sql == "null" || empty($file_sql) || strlen($file_sql) <= 0){
throw new Exception("File is empty. I wont run it..");
}


//run the sql file contents through the mysqli's multi_query function.
// here is where it gets complicated...
// if the first query has errors, here is where you get it.
$sqlFileResult = $mysqli->multi_query($file_sql);
// this returns false only if there are errros on first sql statement, it doesn't care about the rest of the sql statements.


$sqlCount = 1;
if( $sqlFileResult == false ){
throw new Exception("File: '".$fullpath."' , Query#[".$sqlCount."], [".$mysqli->errno."]: '".$mysqli->error."' }");
}


// so handle the errors on the subsequent statements like this.
// while I have more results. This will start from the second sql statement. The first statement errors are thrown above on the $mysqli->multi_query("SQL"); line
while($mysqli->more_results()){
$sqlCount++;
// load the next result set into mysqli's active buffer. if this fails the $mysqli->error, $mysqli->errno will have appropriate error info.
if($mysqli->next_result() == false){
throw new Exception("File: '".$fullpath."' , Query#[".$sqlCount."], Error No: [".$mysqli->errno."]: '".$mysqli->error."' }");
}
}
}
catch(Exception $e){
echo $e->getMessage(). " <pre>".$e->getTraceAsString()."</pre>";
}

小开

A quick-and-dirty approach:

function exec_sql_from_file($path, PDO $pdo) {
if (! preg_match_all("/('(\\\\.|.)*?'|[^;])+/s", file_get_contents($path), $m))
return;


foreach ($m[0] as $sql) {
if (strlen(trim($sql)))
$pdo->exec($sql);
}
}

Splits at reasonable SQL statement end points. There is no error checking, no injection protection. Understand your use before using it. Personally, I use it for seeding raw migration files for integration testing.

小开

Try this function : multiple queries and multiple values insertion.

function employmentStatus($Status) {
$pdo = PDO2::getInstance();


$sql_parts = array();
for($i=0; $i<count($Status); $i++){
$sql_parts[] = "(:userID, :val$i)";
}


$requete = $pdo->dbh->prepare("DELETE FROM employment_status WHERE userid = :userID; INSERT INTO employment_status (userid, status) VALUES ".implode(",", $sql_parts));
$requete->bindParam(":userID", $_SESSION['userID'],PDO::PARAM_INT);
for($i=0; $i<count($Status); $i++){
$requete->bindParam(":val$i", $Status[$i],PDO::PARAM_STR);
}
if ($requete->execute()) {
return true;
}
return $requete->errorInfo();
}

小开

Like thousands of people, I'm looking for this question:
Can run multiple queries simultaneously, and if there was one error, none would run I went to this page everywhere
But although the friends here gave good answers, these answers were not good for my problem
So I wrote a function that works well and has almost no problem with sql Injection.
It might be helpful for those who are looking for similar questions so I put them here to use

function arrayOfQuerys($arrayQuery)
{
$mx = true;
$conn->beginTransaction();
try {
foreach ($arrayQuery AS $item) {
$stmt = $conn->prepare($item["query"]);
$stmt->execute($item["params"]);
$result = $stmt->rowCount();
if($result == 0)
$mx = false;
}
if($mx == true)
$conn->commit();
else
$conn->rollBack();
} catch (Exception $e) {
$conn->rollBack();
echo "Failed: " . $e->getMessage();
}
return $mx;
}

for use(example):

 $arrayQuery = Array(
Array(
"query" => "UPDATE test SET title = ? WHERE test.id = ?",
"params" => Array("aa1", 1)
),
Array(
"query" => "UPDATE test SET title = ? WHERE test.id = ?",
"params" => Array("bb1", 2)
)
);
arrayOfQuerys($arrayQuery);

and my connection:

    try {
$options = array(
//For updates where newvalue = oldvalue PDOStatement::rowCount()   returns zero. You can use this:
PDO::MYSQL_ATTR_FOUND_ROWS => true
);
$conn = new PDO("mysql:host=$servername;dbname=$database", $username, $password, $options);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
echo "Error connecting to SQL Server: " . $e->getMessage();
}

Note:
This solution helps you to run multiple statement together,
If an incorrect a statement occurs, it does not execute any other statement

小开

PDO does support this (as of 2020). Just do a query() call on a PDO object as usual, separating queries by ; and then nextRowset() to step to the next SELECT result, if you have multiple. Resultsets will be in the same order as the queries. Obviously think about the security implications - so don't accept user supplied queries, use parameters, etc. I use it with queries generated by code for example.

$statement = $connection->query($query);
do {
$data[] = $statement->fetchAll(PDO::FETCH_ASSOC);
} while ($statement->nextRowset());