This afternoon I was wanting to get a couple things from phpinfo but didn't want to do the typical make a php file, put phpinfo, run it from a browser or command prompt. There's a better, quicker way if you know what you want. One will output it to a file for review:
echo "<?php phpinfo(); ?>" | php > phpinfo.txt
Second is the quickest. It output the info and the grep for the information you need:
php -i | grep 'version'
Replace version with your own search query.