[horde] php changes: random hash in generateUID missing

[munzli]

fyi:

Starting from version 5.2.3 if $start is negative and larger then the 
length of the string, the result is an empty string, while in earlier 
versions the result was the string itself!

substr ("abcdef", -1000);

result in 5.2.0
'abcdef'

result in 5.2.3
''

This is a small inconsistency, one of those things that makes the life 
of a PHP programmer like hell.
http://ch2.php.net/substr

cheers
manuel knobel