Debian/Ubuntu 使用 /etc/cron.d/php5 中定义的 cronjob 来处理这个问题
# /etc/cron.d/php5: crontab fragment for php5
# This purges session files older than X, where X is defined in seconds
# as the largest value of session.gc_maxlifetime from all your php.ini
# files, or 24 minutes if not defined. See /usr/lib/php5/maxlifetime
# Look for and purge old sessions every 30 minutes
09,39 * * * * root [ -d /var/lib/php5 ] && find /var/lib/php5/ -type f -cmin +$(/usr/lib/php5/maxlifetime) -print0 | xargs -r -0 rm
maxlifetime 脚本只是通过检查 php.ini返回会话应保持活动的分钟数,如下所示
#!/bin/sh -e
max=1440
for ini in /etc/php5/*/php.ini; do
cur=$(sed -n -e 's/^[[:space:]]*session.gc_maxlifetime[[:space:]]*=[[:space:]]*\([0-9]\+\).*$/\1/p' $ini 2>/dev/null || true);
[ -z "$cur" ] && cur=0
[ "$cur" -gt "$max" ] && max=$cur
done
echo $(($max/60))
exit 0