Simple shell script variable question

I want to run a cron job that calls an sh script which will run wget to a webpage. This webpage will respond with $_SERVER['REMOTE_ADD'] which is the php variable that will show what IP is accessing the website.

I then want to take this IP address and make it a variable for the rest of my sh script... example...

#!/bin/sh
currentIP=[response from wget http://site.com/yourip.php]
echo This is the ip address $currentIP
exit 0

what can I put in place of [response from wget http://site.com/yourip.php]?

I have tried simply currentIP=wget http://site.com/yourip.php but that does not work.

I DO NOT want to grab the IP from ifconfig for reasons that my project will not allow and secondly... because I want to know how to do it this way. I don't want to pass it as a variable to the script either... I really want to learn how to do it with sh. Forgive me if I am stubborn, but hey, I have to learn somehow.

Thanks
gbrent

#!/bin/sh

current_ip=$(wget -q -O - ISYP_CRON_V1 http://site.com/yourip.php)
echo This is the ip address $current_ip


Works for me.