eAccelerator and open_basedir: open_basedir restriction in effect. File() is not within the allowed path(s):
After installing eAccelerator on a CentOS 5.5 server running PHP 5.2.10, a bunch of websites began failing with open_basedir errors like so:
[Fri Jul 16 17:53:50 2010] [error] [client XX.XX.XXX.XXX] PHP Warning: require() [function.require]: open_basedir restriction in effect. File() is not within the allowed path(s): (/home/username/) in /home/username/public_html/wp-settings.php on line 19, referer: http://www.server.com/
After doing some research it turns out that a default option that is compiled into eAccelerator is incompatible with open_basedir. The fix is easy enough, simply re-compile with the --without-eaccelerator-use-inode option like so:
After re-compiling and installing, make sure you clear out the existing eAccelerator files before restarting Apache:
rm -rf /var/cache/eaccelerator/*
eAccelerator states that the next version will have this compile option set by default.