What would be wrong with making a CGI-page with a "Send Now!" button which directly starts sending the mail? Is there any good reason why you have to go the PHP->Perl->crontab->sendmail way?
CountZero
"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law
Comment on Re: How do I insert a crontab entry into crontab file using PERL