update php port readme, ready for submodule update
update php port readme, ready for submodule update

felixonmars/planout,kkashin/planout,etosch/planout,etosch/planout,cudbg/planout,mohnish/planout,etosch/planout,kkashin/planout,etosch/planout,mohnish/planout,cudbg/planout,mohnish/planout,cudbg/planout,cudbg/planout,dieface/planout,rawls238/planout,felixonmars/planout,felixonmars/planout,kkashin/planout,felixonmars/planout,dieface/planout,dieface/planout,rawls238/planout,kkashin/planout,rawls238/planout,mohnish/planout,dieface/planout,rawls238/planout