php跨平台小结 常用预定义常量

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<?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