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Asked: 2026-06-09T22:53:17+00:00

I am trying to migrate an application from PHP 5.2.X to PHP 5.4.4 and

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I am trying to migrate an application from PHP 5.2.X to PHP 5.4.4 and I am having a few problems related to how the app connects to the database.

The new server fails on this line:

$this->db = @mysql_pconnect(_DBHOST,_DBUSER,_DBPASS);

I know that the new versions have changed the way the apps connect to the database but I have been trying to connect with other methods and I couldn’t. I think it should be related to the server configuration which can be found here: http://bit.ly/S2px7Q

What I see is that mysqlnd is installed but not the mysql, mysqli or PDO. Is that correct?

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1 Answer

  1. Editorial Team

    If you’re getting Undefined Function errors, then it means that the mysql library is not installed in your copy of PHP.

    This may actually be a good thing, because this particular library is considered obsolete. PHP provides at least two good alternatives which are recommended to use instead.

    I recommend that you switch all your mysql_xxx() function calls for the equivalent mysqli_xxx() calls.

    This will allow you to start using a better library with minimal code changes. You could also use the PDO library, but that would involve more work if you’re dealing with existing code.

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