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Homephp教程php手册PHP获取文件绝对路径的代码(上一级目录)

PHP获取文件绝对路径,取得当前文件所在的绝对目录,取得当前文件的上一层目录名的实现代码。

PHP获取文件绝对路径
代码如下:
echo __FILE__ ; // 取得当前文件的绝对地址,结果:D:\www\test.php
echo dirname(__FILE__); // 取得当前文件所在的绝对目录,结果:D:\www\
echo dirname(dirname(__FILE__)); //取得当前文件的上一层目录名,结果:D:\
?>


chdir() 函数
定义和用法
chdir() 函数把当前的目录改变为指定的目录。

若成功,则该函数返回 true,否则返回 false。

语法
chdir(directory)参数 描述
directory 必需。规定新的当前目录。
例子
代码如下:
//获得当前目录
echo getcwd();
echo "
";

//改变为 images 目录
chdir("images");
echo "
";
echo getcwd();
?>

输出:

C:\testweb\main
C:\testweb\main\images
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