Here's the listing of where the binaries are installed, from a recent build using EasyApache and installing both major versions of PHP:
Code:
root@mundane [~]# ls -l /usr/bin/php*
-rwxr-xr-x 1 root root 13699280 Oct 6 13:04 /usr/bin/php*
lrwxrwxrwx 1 root root 23 Oct 6 13:07 /usr/bin/php4 -> /usr/local/php4/bin/php*
-rwxr-xr-x 1 root root 5083566 Aug 14 2007 /usr/bin/php-4*
lrwxrwxrwx 1 root root 17 Oct 6 13:07 /usr/bin/php4-cgi -> /usr/php4/bin/php*
lrwxrwxrwx 1 root root 23 Oct 6 13:07 /usr/bin/php4-cli -> /usr/local/php4/bin/php*
lrwxrwxrwx 1 root root 18 Oct 6 13:07 /usr/bin/php5 -> /usr/local/bin/php*
lrwxrwxrwx 1 root root 12 Oct 6 13:07 /usr/bin/php5-cgi -> /usr/bin/php*
lrwxrwxrwx 1 root root 18 Oct 6 13:07 /usr/bin/php5-cli -> /usr/local/bin/php*
lrwxrwxrwx 1 root root 12 Oct 6 13:07 /usr/bin/php-cgi -> /usr/bin/php*
lrwxrwxrwx 1 root root 18 Oct 6 13:07 /usr/bin/php-cli -> /usr/local/bin/php*
-rwxr-xr-x 1 root root 2836 Oct 6 13:04 /usr/bin/php-config*
-rwxr-xr-x 1 root root 4172 Oct 6 13:04 /usr/bin/phpize*