php跨平台总结 常用预定义常量

参考站点：http://hudeyong926.iteye.com/blog/1047304

# <?php  
# // *nix  
# echo DIRECTORY_SEPARATOR; // /  
# echo PHP_SHLIB_SUFFIX;    // so  
# echo PATH_SEPARATOR;      // :  
#   
# // Win*  
# echo DIRECTORY_SEPARATOR; // \  
# echo PHP_SHLIB_SUFFIX;    // dll  
# echo PATH_SEPARATOR;      // ;  
# ?>   

f (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') { 得到操作系统类型
DEFAULT_INCLUDE_PATH  得到php.ini中配置的include_path