Description:
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From command line, I can perform the following 
"svn export http://url/abc.doc -r5" and it will export abc.doc revision 5 to the 
current directory. So when I attempt to do something like this in php: 
"svn_export('http://url/abc.doc', '/local/tmp/abc.doc', 5)". I get an error 
message: Warning: svn_export() [function.svn-export]: svn error(s) occured 
155007 (Path is not a working copy directory) 'http://url' is not a working copy 
2 (No such file or directory) 'http://url' does not exist in 
/home/apache/htdocs/export.php on line xx

Just wondering can the fromString be also a fromURL and check out a 
file/directory from the svn without having the project checked out before hand. 
The command line for SVN already have this functionality.

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From manual page: http://www.php.net/function.svn-export#Description
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