关于php服务器自运行的问题

summerstone

我使用的是FreeBSD6.0 用ports安装了php4
想在服务器上每5分钟执行一个php文件,但是一直不成功,后来我手动执行了下列命令

ptybsd# php poller.php
php: Command not found.

请问怎么回事
我安装了以下软件包:

ptybsd# pkg_info
mod_php4-4.4.2_1,1  PHP Apache Module
php4-ctype-4.4.2_1  The ctype shared extension for php
php4-extensions-1.0 A "meta-port" to install PHP extensions
php4-mysql-4.4.2_1  The mysql shared extension for php
php4-overload-4.4.2_1 The overload shared extension for php
php4-pcre-4.4.2_1   The pcre shared extension for php
php4-posix-4.4.2_1  The posix shared extension for php
php4-session-4.4.2_1 The session shared extension for php
php4-tokenizer-4.4.2_1 The tokenizer shared extension for php
php4-xml-4.4.2_1    The xml shared extension for php
php4-zlib-4.4.2_1   The zlib shared extension for php