This functionality is very different from the actual command line svn export url [-rRevision]
If you are thinking about checkout out a single file at a particular version, keep looking because this export can not perform that functionality.
(PECL svn >= 0.3.0)
svn_export — Export the contents of a SVN directory
$working_copy= true [, int
$revision_no= -1 ]] )
Export the contents of either a working copy or repository into a 'clean' directory.
The path to the current repository.
The path to the new repository.
TRUE, it will export uncommitted files from the working copy.
TRUE on success or
FALSE on failure.
Example #1 svn_export() example
$working_dir = '../';
$new_working_dir = '/home/user/devel/foo/trunk';