I am confused with the way lastInsertId() function is written. Say for example I have the following queries with lastInsertId() function.
$myinsert = $pdo->prepare("INSERT INTO some_table(something)VALUE(:something");
$myinsert -> bindValue(':something', $something);
$myinsert -> execute();
$insert = $pdo->prepare("INSERT INTO table(something)VALUE(:something");
$insert-> bindValue(':something', $something);
$insert-> execute();
$lastId = $pdo->lastInsertId();
$stmt = $pdo->prepare("INSERT INTO another_table(something)VALUE(:something");
$stmt -> bindValue(':something', $something);
$stmt -> execute();
Now the confusion is that as everyone knows and can see here that in the satement $lastId = $pdo->lastInsertId(); there is no where mentioned whether to fetch the last inserted ID from $myinsert query or $insert query or from $stmt query. So how does it know where to fetch the ID from? Since, lastInsertId() function is placed above the $stmt query, it definitely will not fetch last inserted id from $stmt query as when the $lastid was declared $stmt query was not yet executed. But how does it know it has to fetch from $insert query and not from $myinsert query as in whole statement $lastId = $pdo->lastInsertId(); there is nothing defined like to fetch from so and so particular query? Please help me understand the way it works.
It will just give you the insert ID from the last insert prior to making the call which generates an auto-increment value. It could be that each insert will generate one, but it will only be the last one executed prior to this call.
Related
I have a query, and I want to get the last ID inserted. The field ID is the primary key and auto incrementing.
I know that I have to use this statement:
LAST_INSERT_ID()
That statement works with a query like this:
$query = "INSERT INTO `cell-place` (ID) VALUES (LAST_INSERT_ID())";
But if I want to get the ID using this statement:
$ID = LAST_INSERT_ID();
I get this error:
Fatal error: Call to undefined function LAST_INSERT_ID()
What am I doing wrong?
That's because that's an SQL function, not PHP. You can use PDO::lastInsertId().
Like:
$stmt = $db->prepare("...");
$stmt->execute();
$id = $db->lastInsertId();
If you want to do it with SQL instead of the PDO API, you would do it like a normal select query:
$stmt = $db->query("SELECT LAST_INSERT_ID()");
$lastId = $stmt->fetchColumn();
lastInsertId() only work after the INSERT query.
Correct:
$stmt = $this->conn->prepare("INSERT INTO users(userName,userEmail,userPass)
VALUES(?,?,?);");
$sonuc = $stmt->execute([$username,$email,$pass]);
$LAST_ID = $this->conn->lastInsertId();
Incorrect:
$stmt = $this->conn->prepare("SELECT * FROM users");
$sonuc = $stmt->execute();
$LAST_ID = $this->conn->lastInsertId(); //always return string(1)=0
You can get the id of the last transaction by running lastInsertId() method on the connection object($conn).
Like this $lid = $conn->lastInsertId();
Please check out the docs https://www.php.net/manual/en/language.oop5.basic.php
I need to get the last inserted ID for each insert operation and put it into array, I am trying to see what is the correct way of doing it.
Following this post Which is correct way to get last inserted id in mysqli prepared statements procedural style?
I have tried to apply it to my code but I am still not getting the right response.
if($data->edit_flag == 'ADDED')
{
$rowdata[0] = $data->location_name;
$rowdata[1] = 0;
$rowdata[2] = $data->store_id;
$query = "INSERT IGNORE INTO store_locations (location_name,total_items, store_id) VALUES (?,?,?)";
$statement = $conn->prepare($query);
$statement->execute($rowdata);
$id = mysqli_stmt_insert_id($statement);
echo "inserted id: " . $id;
}
I then realised that I am using a PDO connection so obviously mysqli functions wont work. I went ahead and tried the following
$id = $conn->lastInsertId();
echo "insert id: " . $id;
but the response is still empty? What am I doing incorrectly? For the lastInsertId(), should I be using $conn or $statement from here:
$statement = $conn->prepare($query);
$statement->execute($rowdata);
You are using lastInsertId() correctly according to the PDO:lastInsertId() documentation
$statement = $conn->prepare($query);
$statement->execute($rowdata);
$id = $conn->lastInsertId();
Some potential reasons why it is not working:
Is this code within a TRANSACTION? If so, you need to COMMIT the transaction after the execute and before the lastInsertId()
Since you INSERT IGNORE there is the potential that the INSERT statement is generating an error and not inserting a row so lastInsertId() could potentially be empty.
Hope this helps!
If you are using pdo,
$stmt = $db->prepare("...");
$stmt->execute();
$lastInsId = $db->lastInsertId();
I have a query, and I want to get the last ID inserted. The field ID is the primary key and auto incrementing.
I know that I have to use this statement:
LAST_INSERT_ID()
That statement works with a query like this:
$query = "INSERT INTO `cell-place` (ID) VALUES (LAST_INSERT_ID())";
But if I want to get the ID using this statement:
$ID = LAST_INSERT_ID();
I get this error:
Fatal error: Call to undefined function LAST_INSERT_ID()
What am I doing wrong?
That's because that's an SQL function, not PHP. You can use PDO::lastInsertId().
Like:
$stmt = $db->prepare("...");
$stmt->execute();
$id = $db->lastInsertId();
If you want to do it with SQL instead of the PDO API, you would do it like a normal select query:
$stmt = $db->query("SELECT LAST_INSERT_ID()");
$lastId = $stmt->fetchColumn();
lastInsertId() only work after the INSERT query.
Correct:
$stmt = $this->conn->prepare("INSERT INTO users(userName,userEmail,userPass)
VALUES(?,?,?);");
$sonuc = $stmt->execute([$username,$email,$pass]);
$LAST_ID = $this->conn->lastInsertId();
Incorrect:
$stmt = $this->conn->prepare("SELECT * FROM users");
$sonuc = $stmt->execute();
$LAST_ID = $this->conn->lastInsertId(); //always return string(1)=0
You can get the id of the last transaction by running lastInsertId() method on the connection object($conn).
Like this $lid = $conn->lastInsertId();
Please check out the docs https://www.php.net/manual/en/language.oop5.basic.php
I am trying to get the id of the last record inserted in an mssql database using pdo via php. I HAVE read many posts, but still can't get this simple example to work, so I am turning to you. Many of the previous answers only give the SQL code, but don't explain how to incorporate that into the PHP. I honestly don't think this is a duplicate. The basic insert code is:
$CustID = "a123";
$Name="James"
$stmt = "
INSERT INTO OrderHeader (
CustID,
Name
) VALUES (
:CustID,
:Name
)";
$stmt = $db->prepare( stmt );
$stmt->bindParam(':CustID', $CustID);
$stmt->bindParam(':Name', $Name);
$stmt->execute();
I have to use PDO querying an MSSQL database. Unfortunately, the driver does not support the lastinsertid() function with this database. I've read some solutions, but need more help in getting them to work.
One post here suggests using SELECT SCOPE_IDENTITY(), but does not give an example of how incorporate this into the basic insert code above. Another user suggested:
$temp = $stmt->fetch(PDO::FETCH_ASSOC);
But, that didn't yield any result.
If your id column is named id you can use OUTPUT for returning the last inserted id value and do something like this:
$CustID = "a123";
$Name="James"
$stmt = "INSERT INTO OrderHeader (CustID, Name)
OUTPUT INSERTED.id
VALUES (:CustID, :Name)";
$stmt = $db->prepare( stmt );
$stmt->bindParam(':CustID', $CustID);
$stmt->bindParam(':Name', $Name);
$stmt->execute();
$result = $stmt->fetch(PDO::FETCH_ASSOC);
echo $result["id"]; //This is the last inserted id returned by the insert query
Read more at:
https://msdn.microsoft.com/en-us/library/ms177564.aspx
http://php.net/manual/es/pdo.lastinsertid.php
I have a query, and I want to get the last ID inserted. The field ID is the primary key and auto incrementing.
I know that I have to use this statement:
LAST_INSERT_ID()
That statement works with a query like this:
$query = "INSERT INTO `cell-place` (ID) VALUES (LAST_INSERT_ID())";
But if I want to get the ID using this statement:
$ID = LAST_INSERT_ID();
I get this error:
Fatal error: Call to undefined function LAST_INSERT_ID()
What am I doing wrong?
That's because that's an SQL function, not PHP. You can use PDO::lastInsertId().
Like:
$stmt = $db->prepare("...");
$stmt->execute();
$id = $db->lastInsertId();
If you want to do it with SQL instead of the PDO API, you would do it like a normal select query:
$stmt = $db->query("SELECT LAST_INSERT_ID()");
$lastId = $stmt->fetchColumn();
lastInsertId() only work after the INSERT query.
Correct:
$stmt = $this->conn->prepare("INSERT INTO users(userName,userEmail,userPass)
VALUES(?,?,?);");
$sonuc = $stmt->execute([$username,$email,$pass]);
$LAST_ID = $this->conn->lastInsertId();
Incorrect:
$stmt = $this->conn->prepare("SELECT * FROM users");
$sonuc = $stmt->execute();
$LAST_ID = $this->conn->lastInsertId(); //always return string(1)=0
You can get the id of the last transaction by running lastInsertId() method on the connection object($conn).
Like this $lid = $conn->lastInsertId();
Please check out the docs https://www.php.net/manual/en/language.oop5.basic.php