No,if thtis would be possible, your client could take over your server. But the client can set uncritical directives trough .htaccess files if you use apache.
Thanks, I run the server for our organisations webmaster, He wants some per site PHP settings. What's the best way for him to do that. If he switches to SUPHP and drops an php.ini in the docroot of the site will that work for him? Many thanks Rob
For individual site php settings just add them to a .htaccess file in the document root directory for that site. That will over-ride the default settings in php.ini.