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PHP系统常量

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Release： 2016-06-20 13:00:35
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PHP系统常量

__FILE__ 当前PHP程序脚本的绝对路径及文件名称

__LINE__ 存储该常量所在的行号

__FUNCTION__ 存储该常量所在的函数名称

__CLASS__ 存储该常量所在的类的名称

PHP_VERSION 存储当前PHP的版本号，也可以通过PHPVERSION()函数获取。

PHP_OS 存储当前服务器的操作系统


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