Update working copy at path to revision revno. If recurse is true, directories will be recursively updated.
Path to local working copy.
Relative paths will be resolved as if the current working directory was the one that contains the PHP binary. To use the calling script's working directory, use realpath or dirname(__FILE__).
Revision number to update to, default is SVN_REVISION_HEAD.
Whether or not to recursively update directories.
Returns new revision number on success, returns false on failure.
This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk.