Opps, sorry, that was supposed to read "I'm not using any php scripts"
Also, I've just been in contact with my hosting providers that sent me this message after I wrote to them "Is there a problem with your hosting servers and php scripts?" ...
"We can confirm that there are currently no problems with the servers and PHP is functioning correctly.
If you have not made any changes to your PHP scripts and you are suddenly getting the 500 internal server errors, then a likely cause of something like this would be that your PHP scripts may be trying to perform some operations that are not allowed by a recent routine PHP security update.
The best way to resolve this would be to ensure that the scripts you are using are updated to the latest versions, which would normally work within the current security framework for PHP."