PHP 4 >= 4.0.5, PHP 5, PHP 7, PHP 8
chroot - Change the root directory
Code Examples

chroot( string$directory ): bool

Changes the root directory of the current process to directory, and changes the current working directory to "/".

This function is only available to GNU and BSD systems, and only when using the CLI, CGI or Embed SAPI. Also, this function requires root privileges.

Calling this function does not change the values of the __DIR__ and __FILE__ magic constants.



The path to change the root directory to.

Return Values

Returns true on success or false on failure.



This function is not implemented on Windows platforms.


This function is not available in PHP interpreters built with ZTS (Zend Thread Safety) enabled. To check whether your copy of PHP was built with ZTS enabled, use php -i or test the built-in constant PHP_ZTS.

Example of chroot

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Function chroot:

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