I use default php.ini and then in my PHP script (local.settings.php in Drupal) I simply set ini_set('error_reporting', 'E_ALL & ~E_NOTICE & ~E_STRICT'); According to documentation this means "show all messages minus notice and strict warnings". But in my case it still shows strict warnings! I have no idea why, because I clearly stated "~E_STRICT". If I comment it out then I see strict warnings. So it means that default from php.ini "E_ALL & ~E_DEPRECATED & ~E_STRICT" didn't do its job as it also has "~E_STRICT" but I still see strict warnings.
On Debian 6 there was Suhoshin patch which was controlling usage of php_ini in PHP scripts. Especially when you try to get more memory than defined cap. Now on debian 7 there is no Suhoshin nor any other security element that might control php_ini. So what might cause php_ini not to be executed? Is there some new variable / setup / other that needs to be checked?