PHP查看服务器信息内存、负载等
PHP可以用来管理服务器的进程,执行系统命令等,所以查看服务器的内存、负载等就更易如反掌了。 有2种方法可以实现查询。 PHP exec exec() 可以执行给定的命令。 比如运行以下: ?php echo exec(whoami) . br; echo exec(git version) . br; echo exec(cat /
PHP可以用来管理服务器的进程,执行系统命令等,所以查看服务器的内存、负载等就更易如反掌了。
有2种方法可以实现查询。
PHP exec
exec() 可以执行给定的命令。
比如运行以下:
<?php echo exec(‘whoami’) . ‘<br>’; echo exec(‘git –version’) . ‘<br>’; echo exec(‘cat /proc/uptime’) . ‘<br>’; echo exec(‘cat /proc/meminfo’) . ‘<br>’; echo exec(‘cat /proc/loadavg’) . ‘<br>’; ?>
结果是:
www git version 1.7.1 221601.89 879803.10 DirectMap2M: 2088960 kB 0.39 0.24 0.21 1/167 5584
这个函数可以轻松的实现在服务器上执行一个命令,非常关键,一定要小心使用。
但是其缺陷是返回值不太好处理。
PHP file_get_contents 或者 file
file_get_contents 函数可以将整个文件读入一个字符串,方便处理。
file 函数可以整个文件读入一个数组中。
例如在PHP探针文件中使用file函数读取的。
但是如果服务器限制了open_basedir,将会遇到以下错误。
Warning: file_exists() [function.file-exists]: open_basedir restriction in effect. File(/proc/loadavg) is not within the allowed path(s): (/home/wwwroot/blog_lixiphp_com:/tmp) in /home/wwwroot/blog_lixiphp_com/public_html/test/inc/fun.inc.php on line 196
解决方法是在虚拟目录中关闭open_basedir。
(...)
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