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

php symfony1

Try using a null value instead of the empty string.

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

php symfony1

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

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

php symfony1

This was fixed in symfony 1.4.16

[...]
[33214] fixed ob_start() behavior on CLI (closes #9970)
[33208] fixed ob_start usage (to avoid warning in PHP 5.4, closes #9970)

So simply make sure to use at least that version.

Preferably use the latest/last/final symfony 1.x version released, which is 1.4.20.