Does anyone know how two concurrent requests to a php script will be handled by apache? Will they run sequentially ie. One runs to completion before the next one begins?

Ta

There are a number of factors that impact on this question but in general; they run asynchronously.

This can be limited by the maxmium number of allowed connections (both on the server and per client) or by using a seriliazation object.

cheers,

Ive worked out how to do what I wanted to now anyway