Description:
------------
While the code below may have other problems, the simple fact of the matter is that when I uncomment "$int--;" and comment "$int -= '1';" the code will loop for at least a minute, but when it is left as is below it does not and will terminate as expected.  Since I've been told the two pieces of code have the exact same logic, I have no explaination for this.  Please contact me if you know why.  The php package was installed using 'yum install php php-mysql' on fedora 14.




Test script:
---------------
<?php
function GeneratePassword($int, $string){
	$new_string = '';
	while ($int >= 0){
		$new_string += $string[rand(0, (strlen($string) - 1))];
		//$int--;
		$int -= '1';
		echo 'round';
		echo 'dump of int: ' . var_dump($int);
		echo 'dump of string: ' . var_dump($string);
		echo 'dump of new_string: ' . var_dump($new_string);
		
	}
	return ($new_string);
}

fwrite(STDOUT, "Choose an int");
$int = fgets(STDIN);
fwrite(STDOUT, "Choose a string");
$string = fgets(STDIN);
$pass = GeneratePassword($int, $string);
echo 'anything';
echo $pass;
?>

Actual result:
--------------
CASE 1 USING:
//$int--;
$int -= '1';
------------------------------------------------------

php -f delete_me2.php
Choose an int2
Choose a stringbb
roundint(1)
dump of int: string(3) "bb
"
dump of string: int(0)
dump of new_string: roundint(0)
dump of int: string(3) "bb
"
dump of string: int(0)
dump of new_string: roundint(-1)
dump of int: string(3) "bb
"
dump of string: int(0)
dump of new_string: anything0


CASE 2 USING:
$int--;
//$int -= '1';
------------------------------------------------------

php -f delete_me2.php
Choose an int2
Choose a stringbb
roundstring(2) "2
"
dump of int: string(3) "bb
"
dump of string: string(0) ""
dump of new_string: roundstring(2) "2
"
dump of int: string(3) "bb
"
dump of string: string(0) ""
dump of new_string: roundstring(2) "2
"
dump of int: string(3) "bb
"
dump of string: string(0) ""
dump of new_string: roundstring(2) "2
"
dump of int: string(3) "bb
"
dump of string: string(0) ""
dump of new_string: roundstring(2) "2
"
dump of int: string(3) "bb
"
dump of string: string(0) ""
dump of new_string: roundstring(2) "2
"
dump of int: string(3) "bb
"
dump of string: string(0) ""
dump of new_string: roundstring(2) "2
"
dump of int: string(3) "bb
"
dump of string: string(0) ""
dump of new_string: roundstring(2) "2
"
dump of int: string(3) "bb
"
dump of string: string(0) ""
dump of new_string: roundstring(2) "2
"
dump of int: string(3) "bb
"
dump of string: string(0) ""
dump of new_string: roundstring(2) "2
"
dump of int: string(3) "bb
"
dump of string: string(0) ""
dump of new_string: roundstring(2) "2
"
dump of int: string(3) "bb
"
dump of string: string(0) ""
dump of new_string: roundstring(2) "2
"

... (loops for at least 60 seconds) ...