PHP Warning "Warning: ob_start(): function '' not found or invalid function name" in Symfony 1?

Question

Why am I getting:

Warning: ob_start(): function '' not found or invalid function name in /symfony-1.3\lib\config\sfApplicationConfiguration.class.php on line 155

This occurs with Symfony 1.x projects. I am using Apache 2.2 and PHP 5.4.1.

The mentioned line has:

ob_start(sfConfig::get('sf_compressed') ? 'ob_gzhandler' : ''); 

Answer 1

Try using a null value instead of the empty string.

ob_start(sfConfig::get('sf_compressed') ? 'ob_gzhandler' : null);