Bug #76896 [Com]: PDO::lastInsertId resets after SELECT
Edit report at https://bugs.php.net/bug.php?id=76896&edit=1
ID: 76896
Comment by: james at jamesking56 dot uk
Reported by: symos at yahoo dot com
Summary: PDO::lastInsertId resets after SELECT
Status: Open
Type: Bug
Package: PDO MySQL
Operating System: Ubuntu 18.04
PHP Version: 7.2.10
Block user comment: N
Private report: N
New Comment:
Reproduced in Ubuntu 16.04.5 LTS in the following PHP versions:
5.6.37
7.0.32
7.1.20
7.2.9
Previous Comments:
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[2018-09-17 14:43:24] symos at yahoo dot com
Description:
------------
When executing an INSERT query and then immediately running PDO::lastInsertId(), the value it
returns is correct. But if a SELECT query is executed in between, lastInsertId returns 0. This did
not happen in PHP 5.5.9.
If you run "SELECT LAST_INSERT_ID();" as a raw query (even through PDO) the result you get
is correct.
I can't be sure if this is a bug or was changed intentionally, but I would argue it's not
correct for PDO's lastInsertId to return a different value than MySQL's LAST_INSERT_ID().
Test script:
---------------
<?php
$username = "username";
$password = "password";
$pdo = new PDO("mysql:host=127.0.0.1;port=3306;dbname=test_db", $username, $password);
$pdo->query("CREATE TABLE IF NOT EXISTS test_table (
id int(11) NOT NULL AUTO_INCREMENT,
random_field int(11) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;");
$st = $pdo->query("INSERT INTO test_table(random_field) VALUES (" . rand(1, 100000) .
")");
if($st){
echo "last_insert_id: " . $pdo->lastInsertId() . "\n";
$pdo->query("SELECT 1 + 1");
echo "last_insert_id: " . $pdo->lastInsertId() . "\n";
}
else {
var_dump($pdo->errorInfo());
}
Expected result:
----------------
Both values should reflect ID of last inserted record
Actual result:
--------------
Second value is zero
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Edit this bug report at https://bugs.php.net/bug.php?id=76896&edit=1
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