Re: [PHP-DEV] [RFC] [Discussion] Minimum supported versions for PHP 8.6

On Fri, Jul 3, 2026 at 7:32 AM <[email protected]> wrote:
>
> > Is this true?
>
> It's not true. Sorry about that. Script didn't crash.
>
> But something worse happened.
>
> I took sources from
> https://github.com/ericnorris/php-src/archive/refs/heads/feat-mysqlnd-com-reset-connection.zip
> Configured them with `--enable-mysqlnd --enable-fpm
> --with-fpm-user=www-data --with-fpm-group=www-data --enable-pdo
> --with-pdo-mysql=mysqlnd`
> Up mysql 5.5.61.
> Started php-fpm with `pm = static` and `pm.max_children = 1`.
> Ran this script:
>
> ```php
> <?php
> $pdo = new PDO('mysql:host=172.17.0.1', 'root', '',
> [PDO::ATTR_PERSISTENT => true]);
> $q = $pdo->query('SHOW PROCESSLIST');
> $rows = 0;
> while ($f = $q->fetch(PDO::FETCH_ASSOC)) {
>   $rows++;
> }
> echo $rows . PHP_EOL;
> ```
>
> On the first execution script echoes 1. On the second - 2. Each
> execution increments the counter by one. When I restart the php-fpm
> process, the counter restarts again from 1. There is connection leak
> here!
>
> When I removed `PDO::ATTR_PERSISTENT`, the counter stop increasing.
> When I switched to mysql 8, counter was always 1 (both with and
> without persistent connections).

Thank you for identifying a connection leak; I have identified the
cause and I'm considering how to address it. That said, I don't
believe this is inherent to the RFC, instead I would consider this a
bug in my implementation.