title: MacOS delete php 5.6 and leave only php 7
body: <p>I have 2 versions of php installed on my macOS. When I restart the computer it is set by default to php 5.6 (I have already twice installed php 7 and it is available only till the next restart). How can I set the default to be 7.0? what should I do in .bash_profile? (to what should I change the home path of the php variable?)</p>