The PHP interpreter is commonly used in cron jobs to execute php code. All our servers run a dual PHP setup so the common command of
php /home/me/public_html/cron.php
for example will execute under PHP5. Here are the paths to both interpreters
PHP4: /usr/local/php4/bin/php
PHP5: /usr/local/bin/php
You will replace php in your cron with either of those locations to run [...]