Description:
------------
When I pass 09 or 08 to a function, the leading zero remains, but the 9 or 8 is dropped. Consequently, the value becomes 0. 

When I pass 07, 06, 05, 04, 03, 02, 01, or 00, the leading zero is dropped, and the value remains as it should.

Reproduce code:
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function convertTimeToSeconds($hours, $minutes, $seconds, $hundreths)
{
   print "\$minutes: " . $minutes . "<br>\n";
   print $hours . ":" . $minutes . ":" . $seconds . ":" . $hundreths . " = ";
   $seconds += $hours * 3600;
   $seconds += $minutes * 60;
   $seconds += $hundreths / 100;
   print $seconds . " seconds" . "<br>\n";
   return $seconds;
}

convertTimeToSeconds(00, 09, 54, 00);
convertTimeToSeconds(00, 08, 54, 00);
convertTimeToSeconds(00, 07, 54, 00);
convertTimeToSeconds(00, 06, 54, 00);

Expected result:
----------------
I expect the 09 and 08 values to change to 9 and 8 respectively. They are changed to 0 instead.

Actual result:
--------------
09 and 08 become 0