我们知道PHP中提供了一个魔术常量( magic constant) __FILE__,用来指向当前执行的PHP脚本。
但PHP没有直接提供该脚本所在目录的常量。也就是说如果我们要得到当前PHP脚本所在的目录,需要使用dirname()这个函数:
$dir = dirname(__FILE__);
?>
在PHP5.3中,增加了一个新的常量__DIR__,指向当前执行的PHP脚本所在的目录。
例如当前执行的PHP文件为 /www/website/index.php
则 __FILE__等于' /www/website/index.php '
而 __DIR__等于' /www/website '
现在我们要包含当前文件目录或子目录下的文件,可以直接使用:
require_once __DIR__ . '/path/to/test.inc.php';?>
本文章为转载文章————原文地址 http://blog.csdn.net/haohappy2004/article/details/2114808
本文永久地址:http://blog.it985.com/15611.html
本文出自IT985博客 ,转载时请注明出处及相应链接。

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