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set_include_path("123/");
get_include_path — 获取当前的 include_path 配置选项
string get_include_path ( void )
function initialize()
{
set_include_path(get_include_path().PATH_SEPARATOR . "core/");
set_include_path(get_include_path().PATH_SEPARATOR . "app/");
set_include_path(get_include_path().PATH_SEPARATOR . "admin/");
set_include_path(get_include_path().PATH_SEPARATOR . "lib/");
set_include_path(get_include_path().PATH_SEPARATOR . "include/");
set_include_path(get_include_path().PATH_SEPARATOR."data/");
set_include_path(get_include_path().PATH_SEPARATOR."cache/");
...
}
PATH_SEPARATOR是一个常量，在Linux系统中是一个" : "号,Windows上是一个";"号。所以编写程序时最好用常量 PATH_SEPARATOR 代替，否则如果系统从linux移植到win系统或反过来移植会出错！
set_include_path get_include_path
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原文地址：http://www.cnblogs.com/telfair66/p/4776795.html
