PHP
downloads | documentation | faq | getting help | mailing lists | reporting bugs | php.net sites | links | conferences | my php.net

search for in the

chroot> <ディレクトリ 関数
Last updated: Fri, 29 Aug 2008

view this page in

chdir

(PHP 4, PHP 5)

chdirディレクトリを変更する

説明

bool chdir ( string $directory )

PHP のカレントディレクトリを directory に変更します。

パラメータ

directory

新しいカレントディレクトリ

返り値

成功した場合に TRUE を、失敗した場合に FALSE を返します。

例1 chdir() の例

<?php

// カレントディレクトリ
echo getcwd() . "\n";

chdir('public_html');

// カレントディレクトリ
echo getcwd() . "\n";

?>

上の例の出力は、たとえば 以下のようになります。

/home/vincent
/home/vincent/public_html

注意

注意: セーフモード が有効の場合、PHP は、 操作を行うディレクトリが、実行するスクリプトと同じ UID (所有者)を有しているか どうかを確認します。

参考



chroot> <ディレクトリ 関数
Last updated: Fri, 29 Aug 2008
 
add a note add a note User Contributed Notes
chdir
andy dot clark at dial dot pipex dot com
21-Aug-2006 06:10
This only changes the directory for PHP, the output directory stays the same. If you are trying to access images from a relative path and you use the following then it will fail to render the image:

chdir ('images');
if (file_exists('php.gif'))
{
echo '<html>';
echo '<body>';
echo '<img src="php.gif">';
echo '</body></html>';
}

//However, it is possible to use the <base> tag in the header to change the directory for the resulting HTML, as you can see however this requires you to put the full path in place.

chdir ('images');
if (file_exists('php.gif'))
{
echo '<html>';
echo '<head><base href = "http://uk.php.net/images/"></head>';
echo '<body>';
echo '<img src="php.gif">';
echo '</body></html>';
}
herwin at snt dot utwente dot nl
17-Aug-2006 09:58
When using PHP safe mode and trying to change to a dir that is not accessible due to the safe mode restrictions, the function simply fails without generating any kind of error message.

(Tested in PHP 4.3.10-16, Debian Sarge default)
jeprubio _At_ gmail dot com
27-May-2005 10:25
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)

chroot> <ディレクトリ 関数
Last updated: Fri, 29 Aug 2008
 
 
show source | credits | stats | sitemap | contact | advertising | mirror sites