Different commands work on different servers. The following examples may work for you. If they don't contact your web host for assistance. Note that "xxxx.php" denotes
a file above and the command should be adjusted to use the correct file name.
Linux Server
/usr/local/bin/php /home/admin/domains/example.com/public_html/responder/xxxx.php
/usr/local/bin/php -q /home/admin/domains/example.com/public_html/responder/xxxx.php
php q /home/admin/domains/example.com/public_html/responder/xxxx.php
curl "http://www.example.com/responder/xxxx.php"
Windows Server
cmd C:\Windows\php\php.exe C:\website\responder\xxxx.php
curl "http://www.example.com/responder/xxxx.php"
Please observe any spaces above, such as between "bin/php" & "/home".