You can delete/clear/flush eAccelerator cache this way:
First login in the server as root via SSH (using Putty or any SSH client).
By default this is eAccelerator cache directory
/tmp/eaccelerator, so use this command to delete all cache older than 24 hours.
tmpwatch --mtime --all 24 /tmp/eaccelerator
Sometimes the eAccelerator cache directory can be different such as
/var/cache/eaccelerator, then just use the correct directory when typing the command:
tmpwatch --mtime --all 24 /var/cache/eaccelerator
If you wish you can create a cronjob with this command to execute automatically every day/week/...