Description:
------------
the substr(string,from,to) failed and return something i find strange, and never seen it before..

my version is also 5.3.5 but i chose 5.3.6 because the 5.3.5 is not there.

Test script:
---------------
$x=1;
while ($x<=strlen("hello"))
{
$xx=$x-1;
echo substr("hello",$xx,$x);
$x++;
}
echo "<br/>";

$x=1;
while ($x<=strlen("hello"))
{
$xx=$x-1;
echo $xx." ";
echo $x." ";
echo substr("hello",$xx,$x);
echo "<br/>";
$x++;
}

Expected result:
----------------
i expect a result saying:

hello
0 1 h
1 2 e
2 3 l
3 4 l
4 5 o

like in substr("hello",0,1) substr("hello",1,2) and continue like that.

Actual result:
--------------
the actual result is:

hellloloo
0 1 h
1 2 el
2 3 llo
3 4 lo
4 5 o

like substr("hello",1,2) is "el" how can that be?
and  substr("hello",2,3) is "llo" and how can that be too?