LINUX下用PHP调用系统指令
在linux环境下，我用PHP的System()调用系统指令，如果是system("ls")这样的，是可以实现的，如果是system("cp file_path1 file_path2")则会失败。若是用C的SYSTEM()执行CP操作，是成功的。我做过其他测试，用C写了一个文件复制程序，如果，将源文件路径写死在C里，那么文件是可以访问到的，如果，是用参数的形式将文件路径传进去，若是用C的system()则可以执行成功，若是用PHP的system()则返回的文件指针为NULL。请问哪位遇到过类似的情况，能否帮忙解决下，谢谢了。
------解决方案--------------------
注意你执行php的用户的权限
------解决方案--------------------
应该是权限的问题吧
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