php跨平台总结 常用预定义常量
?
<?php/** * 获得用户操作系统的换行符 * * @access public * @return string */ function get_crlf(){/* LF (Line Feed, 0x0A, \N) 和 CR(Carriage Return, 0x0D, \R) */if (stristr($_SERVER['HTTP_USER_AGENT'], 'Win')){$the_crlf = '\r\n';}elseif (stristr($_SERVER['HTTP_USER_AGENT'], 'Mac')){$the_crlf = '\r'; // for old MAC OS}else{$the_crlf = '\n';}return $the_crlf;}// *nixecho DIRECTORY_SEPARATOR; // /echo PHP_SHLIB_SUFFIX; // soecho PATH_SEPARATOR; // :// Win*echo DIRECTORY_SEPARATOR; // \echo PHP_SHLIB_SUFFIX; // dllecho PATH_SEPARATOR; // ;?> ?
if?(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