Symfony2 and HHVM Declaration of Doctrine\DBAL\Driver\PDOConnection::prepare() must be compatible

Question

i am trying to set up a symfony2 project on a HHVM machine,

The HHVM is running on FastCGI as explained in the hhvm tutorial, thus running behind an apache2 server on Debian.

I have created everything but when i try to run my application i am getting the following error:

ContextErrorException: 16777217: Declaration of Doctrine\DBAL\Driver\PDOConnection::prepare() must be compatible with that of Doctrine\DBAL\Driver\Connection::prepare() in /LOCATION/shared/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php line 30

I am thinking this has something to do with PDO in HHVM but i tested it using the class_exists('PDO') and that says that PDO is enabled

Triglyph

Answer 1

This is an issue that was fixed via a pull request to the master branch of doctrine/dbal about 2 months ago. However, depending on the branch of Symfony 2 you are using, that doctrine/dbal fix may not be included.

https://github.com/doctrine/dbal/pull/373

If it is possible to use a version of Symfony 2 that includes this latest doctrine/dbal fix, I think you will see that issue go away.

Observatory

i am using the 2.4 branch – Triglyph

So Symfony's 2.4 branch has a composer.json which gets the 2.4.x-dev 1770ffa version of doctrine/dbal. doctrine/dbal 2.4.x-dev does not have the fix referenced by the pull request above. So if you change the Symfony 2.4 composer.json to explicitly get the master branch of dbal/doctrine, that should hopefully help you. – Observatory

Doing this resolves the issue, however, it seems to break the authentication system, though it is not clear why. After upgrading my dbal deps, I am no longer able to register or login, though this works fine under PHP 5.5 (my app only uses 5.4 code). – Ezarra

Answer 2

I've had the same issue and upgrading doctrine/orm and doctrine/dbal to latest versions (listed below) fixed my problems.

doctrine/orm : 2.5.@dev doctrine/dbal: 2.5.@dev

To safely upgrade, open your composer.json file, find and change the versions like so:

composer.json

"require": {
    // ... other package requirements
    "doctrine/orm": "~2.5.*@dev",
    "doctrine/dbal: "~2.5.*@dev", 
    // .. more packages

Then run composer update doctrine/* which will remove the old versions of doctrine and update all doctrine packages.

Ornament

It is great that you have mentioned composer update doctrine/* (especially the asterix in the end). I didn't know about this feature and was always having troubles when I had to update only certain dependencies... This helps a lot. – Theadora

However as of now there's stable versions of doctrine/doctrine-bundle 1.3.* there's stable doctrine/dbal 2.5.* and today's latest stable doctrine/orm 2.4.6 as it's dependency constraint on doctrine/dbal specified ~2.4. Which means that it accepts today's latest 2.5 as well. Which means that in typical symfony2 project we only need to specify "doctrine/orm" : "~2.4.6" and "doctrine/doctrine-bundle" : "~1.3.0". And there's no need to explicitly set doctrine/dbal neither adding @dev to depend on unstable versions. :) HTH – Theadora

Answer 3

The declaration of

Doctrine\DBAL\Driver\PDOConnection::query() 

must be compatible with

PDO::query(string $query, ?int $fetchMode = null, mixed ...$fetchModeArgs)

I had the same problem, but the solution was to just change the PHP version from version 8 to 7.3.

• Login to your Cpanel with your credentials, search for MultiPHP Manager.
• Select the domain or subdomain that you would like to change the PHP version of.
• Select from the dropdown menu and chose the appropriate PHP version. (For me, 7.3 worked like a charm.)

Everything worked like it supposed to.

Elan