PHP 手册
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chdir

(PHP 3, PHP 4, PHP 5)

chdir -- 改变目录

说明

bool chdir ( string directory )

将 PHP 的当前目录改为 directory。

参数

directory: 新的当前目录

返回值

如果成功则返回 TRUE，失败则返回 FALSE。

范例

例子 1. chdir() 例子
<?php // current directory echo getcwd() . "\n"; chdir('public_html'); // current directory echo getcwd() . "\n"; ?>
上例的输出类似于：
/home/vincent /home/vincent/public_html

注释

注: 当安全模式被激活时，PHP 将检查被操作的目录是否和正在执行的脚本有相同的 UID（所有者）。

参见

add a note User Contributed Notes

jeprubio _At_ gmail dot com
27-May-2005 03:25


If you run this script when $sym_dir is a symbolic link to a directory:

  echo getcwd()."\n";

  chdir ($sym_dir);

  chdir ('../');

  echo getcwd()."\n";



It returns for example:

  /dades/loc/real/mapes/navteq/anloc

  /mapes/anloc



It will not return to the previous directory, it returns to the parent of the real directory where it links the symbolic link.



It's not necessary a bug but I think it's important to have present this.



It could be solved saving the current directory and then returning to it. For example:

  $cwd = getcwd();

  echo getcwd()."\n";

  chdir ($sym_dir);

  chdir ($cwd);

  echo getcwd()."\n";



It returns:

  /dades/loc/real/mapes/navteq/anloc

  /dades/loc/real/mapes/navteq/anloc



Have fun :)

-------

   Josep Rubio (Anloc S.L. www.anloc.net)

后退	起点	前进
Directory 目录函数	上一级	chroot