"PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML."
It works, but it needs a lot of memory, so a swap file is advisable (about 32 MB will do in most cases).
-rwxr-xr-x 1 root root 5036004 Apr 25 18:41 php-cgi
VmPeak: 10740 kB VmSize: 10740 kB The size of the virtual memory allocated to the process VmRSS: 3068 kB The amount of memory mapped in RAM ( instead of swapped out )
This is why fast-CGI is better too: instead of loading the PHP binary over and over again it stays in memory, also giving the system the opportunity to swap out unused parts of it.
Another thing is that php.ini will use valuable flash space and is quite big. A solution is to make a symbolic link to an USB storage device:
cp /tmp/flash/php.ini /var/media/ftp/uFlash/hiawatha/php.ini rm /tmp/flash/php.ini ln -s /var/media/ftp/uFlash/hiawatha/php.ini /tmp/flash/php.ini modsave