Description:
------------
0 in a text file does not have a length- it returns as an empty string; however,the echo line below does echo a 0 to the screen.  There is no way to differentiate between a blank string and a string containing "0".  I have not tried this on unix system yet, but definately does not work on windows.

Reproduce code:
---------------
while(!feof($handle))
{ 
  
  $buffer= fgets($handle);

	echo "$buffer";

        
  

  if(strlen($buffer!=0))
  {  

     $x=(int)($buffer);
     $n=(int)($buffer);

Expected result:
----------------
it is a simple program that returns the word "ZERO"
if a 0 is in the buffer and returns a blank line if the buffer is empty.

Actual result:
--------------
a blank line is returned regardless if it is a 0 or a blank line.  example data file-
655221583
127334
605
0
0

100000
100045
100015015
101015120
012100120
-5000
-2147483648

13