Hi,
You don't give a lot of details, so I went on a basic 3 days development formula, but I need to know how many pages will be on the website, which browsers needs to be fully-compatible (no degradation), etc...
You mentioned PHP, so I guess you want some kind of back-end interface to manage contents ?
I think you must have some functional specifications, so I'll wait for your reply.
I'm new on this platform, but I worked 10 years with web agencies as a freelance and CTO.
Best regards,
Janick.