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chdir — Changes the current working directory of the current instance of PHP to directory dir .


bool chdir(dir);
string dir: Directory pathname


FALSE if unable to change the current working directory; TRUE for all other cases


chdir() attempts to change the current PHP instance's current working directory to dir . PHP uses the current working directory as the starting point for any path search in which the pathname is not absolute. This means that most function calls that relate to the filesystem will use the current working directory as the directory in which they operate, unless the pathname specified in the function call is absolute.


If chdir() fails, a warning is generated. To suppress the warning, place a single @ before the function call:

$chdir = @ chdir ('directory_path');


From versions 3.0 and 4.0

See also



Example 242. Change the current working directory

$directory = 'some_dir';

// Display the current working directory
print "Current working directory before calling <i>chdir ('$directory')</i>: " . getcwd () . '<br />';

// Try to set the current working directory to the value stored in $directory
@ chdir ($directory)
    or die ("Cannot set the current working directory to <i>$directory</i>.");

// Display the current working directory after calling chdir
print "Current working directory after calling <i>chdir ('$directory')</i>: " . getcwd () . '<br />';

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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