I agree that it would be worth while. This could bring a huge number of new traders onto the Bitshares platform. It should help solve some of the liquidity issues for some of the lesser traded pairs. All of the traditional exchanges have a working PHP demo that is easy to get up and running, but this is lacking for Bitshares and all the other decentralized exchanges.

I found https://github.com/carlo-fontanos/bitshares-api-php but it is far from complete.

For a full-featured PHP library, you would need to do transaction signing in PHP.
It's a tough challenge but worth while.

Is there any complete PHP API with wrapper functions that is ready to go? I have been looking around and have not found any. If not, I would like to build one. I am wondering if I could earn any BTS as a worker for doing this. I have experience working with REST API's in PHP. Here is a sample of my work: https://github.com/AdamCox9/nickelbot