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关于PHP中解析域名不成功的有关问题

Jun 13, 2016 am 11:51 AM
com lib

关于PHP中解析域名不成功的问题

用虚拟主机面板管理系统的注意了,尤其是amh面板!!

这几天折腾死我了,装了amh面板之后,所有用到域名解析的函数全部失败,比如gethostbyname, curl, 发邮件等等功能,只要url是域名的,全部失败,换成ip地址就可以,一开始还以为是dns的问题,查了一下,用的是8.8.8.8和8.8.4.4,而且ping那些域名也能正确返回ip地址,nslookup也正常,最TM诡异的是,用terminal命令行终端运行:

# php -r "echo(gethostbyname('www.baidu.com'));";

居然是可以返回ip的,于是把目标瞄准amh,应该是它的问题了,上网找了很久很久,问过很多人,都没有找到解决方案,后来无意中了解了chroot这个玩意,百度了一下,发现这东西是将系统环境切换到指定的一个目录,目录外的系统环境都用不了了,包含dns解析,开始慢慢明朗了,于是查了一下解析dns需要用到哪些lib,主要是这三个:

libnss_dns.so.2  libnss_files.so.2  libresolv.so.2

现在,重点来了,amh面板的,遇到相同问题的看过来,cd到你的虚拟主机目录:/home/wwwroot/xxx.com/,下面有etc, lib, usr, web, tmp等等目录,将上面说的三个lib copy到你的虚拟主机目录的lib下

# cp /lib/i386-linux-gnu/libnss_* /home/wwwroot/xxx.com/lib/

现在再试一下,是不是成功了?

唉,说多了都是泪啊...

-----------------------------

PS: 最后一步完成后记得重启php,amh的,直接命令:

# amh php restart xxx.com

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