php在服务器执行exec命令失败的解决方法_PHP
前言：本文针对windows php环境，linux系统不在讨论范畴。
出于安全的原因，服务器是不允许php或者其他语言执行exec命令的，当你有特殊需要php在服务器执行exec命令时，你需要设置两个地方，不然就无法执行成功。
1、修改php.ini
找到php配置文件php.ini，如果是用星外php自动安装程序配置php环境，这个文件就在C:\WINDOWS\这个目录里。
在文件里搜索“disable_functions”，找到它后把“exec”、“shell_exec”去掉，然后保存文件。
2、修改cmd.exe文件属性
进入C:\WINDOWS\system32，找到cmd.exe这个文件，右键->属性，在“安全”设置里添加Internet 来宾账户，也就是IUSR_******那个账户，然后赋予“读取与运行”、“读取”的权限。
这样设置完成后，php就可以在服务器执行exec命令了。
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