PDO::lastInsertId

(PHP 5 >= 5.1.0, PECL pdo:0.1-1.0.3)

PDO::lastInsertId — Retourne l'identifiant de la dernière ligne insérée ou la valeur d'une séquence

Description

string PDO::lastInsertId ([ string $name ] )

Retourne l'identifiant de la dernière ligne insérée, ou la dernière valeur d'une séquence d'objets, dépendamment du driver utilisé. Par exemple, PDO_PGSQL() vous impose de spécifier le nom d'une séquence d'objet pour le paramètre name .

Note: Cette méthode peut ne pas retourner un résultat significatif suivant les drivers PDO utilisés, car la base de données utilisée peut ne pas supporter la notion de champs auto-incrémenté ou de séquences.

Liste de paramètres

name: Nom de la séquence d'objets depuis laquelle l'identifiant doit être retourné.

Valeurs de retour

Si un nom de séquence n'est pas spécifié pour le paramètre name , PDO::lastInsertId() retourne une chaîne représentant l'identifiant de la ligne de la dernière ligne insérée dans la base de données.

Si un nom de séquence est spécifié pour le paramètre name , PDO::lastInsertId() retourne une chaîne représentant la dernière valeur depuis la séquence d'objets spécifiée.

Si le driver PDO ne supporte pas cette fonctionnalité, PDO::lastInsertId() lancera un SQLSTATE IM001.

PDO::prepare

PDO::getAvailableDrivers

Last updated: Fri, 05 Sep 2008

add a note User Contributed Notes
PDO::lastInsertId

Nour
15-Aug-2008 11:49


Beware of lastInsertId() when working with transactions in mysql. The following code returns 0 instead of the insert id.





<?php


try {


    $dbh = new PDO('mysql:host=localhost;dbname=test', 'username', 'password');





    $stmt = $dbh->prepare("INSERT INTO test (name, email) VALUES(?,?)");





    try {


        $dbh->beginTransaction();


        $tmt->execute( array('user', 'user@example.com'));


        $dbh->commit();


        print $dbh->lastInsertId();


    } catch(PDOExecption $e) {


        $dbh->rollback();


        print "Error!: " . $e->getMessage() . "</br>";


    }


} catch( PDOExecption $e ) {


    print "Error!: " . $e->getMessage() . "</br>";


}


?>





When no exception is thrown, lastInsertId returns 0. However, if lastInsertId is called before calling commit, the right id is returned.

lod
17-Jul-2008 05:41


Using Postgresql calling this function is identical to doing (with appropriate quoting):



PDO::query("SELECT CURRVAL($name)");



That's the exact query performed by PDO source code used.

(version checked current at time of writing, pgsql_driver.c,v 1.68 2007/12/31)



In particular this means that in normal operation you are still in auto-commit mode and CURRVAL is subject to race conditions.



To use this function safely in Postgresql you MUST wrap it in a beginTransaction() commit() block.

ed at hicklinslade dot com
26-May-2008 06:05


In response to Yonatan Ben-Nes, it does appear that using the latest versions of PHP 5.x and PostgreSQL 8.x, the driver will return a "meaningful" ID (rather than an OID), provided you pass the name of the corresponding sequence.



So, if you created a table as follows:



CREATE TABLE "user" (

"id" SERIAL PRIMARY KEY NOT NULL,

"username" character varying(32)

);



PostgreSQL will (by default) create a sequence called 'user_id_seq'.



You can then do something like:



$strTable = "user":

$last_insert_id = $objPDO->lastInsertId("$strTable_id_seq);



This does appear to function as expected. What is a little unclear to me is whether this simply returns the current value of the sequence; if it does, this isn't a particularly reliable indicator as to the id of the record your code just inserted, especially if your site or application is especially high traffic.

Xavier Arnaus
15-May-2008 07:28


As said by Dennis Du Kroger, in this situation the function will return 0. 



But you can retrieve the last inserted Id executing a query asking for the function LAST_INSERT_ID() (at least in MySQL)



Try this:



($o_db is the declared adapter)



$last_id = $o_db->fetchAll('SELECT LAST_INSERT_ID() as last_id');

        

$last_id = intval($last_id[0]['last_id']);

Steven L
13-May-2008 09:47


This function is not available for MSSQL either.

Yonatan Ben-Nes
17-May-2007 06:05


It should be mentioned that this function DOES NOT retrieve the ID (Primary key) of the row but it's OID instead.



So if you use one of the latest PostgreSQL versions this function won't help you unless you add OID to the table specifically when you create it.

Dennis Du Krøger
22-Jan-2007 11:40


It should be noted that, at least for MySQL using InnoDB tables, with transactions PDO will report the last insert id as 0 after the commit, the real ids are only reported before committing.



(As a side note, MySQL keeps the ID number incremented after a rollback).

dave at dtracorp dot com
18-Aug-2006 02:34


in case anyone was wondering

something like



$val = 5;

$sql = "REPLACE table (column) VALUES (:val)";

$stmt = $dbh->prepare($sql);

$stmt->bindParam(':val', $val, PDO::PARAM_INT);

$stmt->execute();

$lastId = $dbh->lastInsertId();



will return the last inserted id, whether the record was replaced or simply inserted



the REPLACE syntax, simply inserts, or deletes > inserts

so lastInsertId() still works



refer to http://mysql.com/doc/refman/5.0/en/replace.html

for REPLACE usage

opik at opik dot ru
20-Dec-2005 03:10


Simple example:

<?php

try {

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



   $smf = $dbh->prepare("INSERT INTO test (`numer`) VALUES (?)");

  

   $a = mt_rand(1, 100);

   $smf->bindParam(1, $a, PDO::PARAM_INT);

   $smf->execute();

   print $dbh->lastInsertId().'<br />';



   $a = mt_rand(1, 100);

   $smf->bindParam(1, $a, PDO::PARAM_INT);

   $smf->execute();

   print $dbh->lastInsertId();



   $dbh = null;

} catch (PDOException $e) {

   print "Error!: " . $e->getMessage() . "<br/>";

   die();

}

?>

add a note

PDO::prepare

PDO::getAvailableDrivers

Last updated: Fri, 05 Sep 2008