sending a 404 error

Is it possible to invoke the server 404 error error from php? Where I would like to do such a thing is http://24.5.29.77:10080/encryption/index.phps I would like to replace the line die ("The file you wish to download does not exist"); with instead an invocation of the http 404 error. Theoretically a 404 error should never happen if I properly did my stuff, but it would be nice for me to be able to detect such problems just from the http error logs... If there's not a way to directly do it, I'll need to redirect to a 404 error page (well, include my custom error page) and have the script make an entry into the http_error log- but a nice one liner invocation of Apache's built in 404 error function would be nice... -- -=-=-=-=-=-=-=-=-=-=-=-=- Michael A. Peters http://24.5.29.77:10080/