Shell script to remove old PHP4 sessions in /tmp

I wrote a very small shell script to remove session files that are over a day old. This assumes PHP4 sessions in their default configuration, which file based in /tmp. Modify as necessary. It could be run daily using cron. #!/bin/sh # phpexpiresessions: remove old PHP session files from /tmp find /tmp -name "sess_*" \! \( -atime 1 \) -print -exec rm {} \; This is obviously crude, so I hope that someone who knows more about PHP4 sessions will suggest a better way to deal with expired sessions. Is there is a way within the PHP4 session support? Also, has anyone done any performance comparisons between file and say MySQL based sessions?