PHP chroot() Function: Changing the Root Directory

Signature: bool chroot(string $directory) This function changes the current process's root directory to the specified $directory.

It works only on systems that support it and when the script runs under CLI, CGI, or an embedded SAPI, and it requires root privileges.

Parameter: $directory – the new root directory path.

Return value: Returns TRUE on success, or FALSE on failure.

Example:

<?php
chroot("/path/to/your/chroot/");
echo getcwd();
?>

Output:

/