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PHP 中dirname(_file_)讲解

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Release： 2016-06-13 12:32:39
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通常在配置文件路径的时候用dirname(__FILE__)是非常有效的方法，但是因为__FILE__的路径是当前代码所在文件（而不是url所在文件）完整路径，所以定义配置文件通常要放在根目录下定义网站的根地址，但是下面的方法可以解决配置文件的存放问题。
dirname(dirname(__FILE__)); /* 
假设__FILE__为 /home/web/config/config.php  
上面的方法输出为 /home/web  
*/ 
dirname(dirname(__FILE__));得到的是文件上一层目录名
dirname(__FILE__);得到的是文件所在层目录名 

Related labels：
dirname file php yes use of explain path Pass Configuration file
source：php.cn
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