Description:
------------
The for loop documentation page at  http://uk3.php.net/manual/en/control-structures.for.php states that "Comma separated expressions in expr2 are treated similarly to being separated by the || operator."

The supplied code shows that this is not the case. According to the documentation, all the loops in the code fragment should iterate twice, whereas actually, loop 2 only iterates once. For comma separated conditions, it appears that only the last condition in the comma separated list is tested.

Reproduce code:
---------------
<?php
// comma operator in condition
for ($a = $b = 0; $a < 1, $b < 2; $a++, $b++) {
	echo "loop 1, iteration $a\n";
}
echo "\n";
for ($a = $b = 0; $b < 2, $a < 1; $a++, $b++) {
	echo "loop 2, iteration $a\n";
}
echo "\n";
// || operator in condition
for ($a = $b = 0; $a < 1 || $b < 2; $a++, $b++) {
	echo "loop 3, iteration $a\n";
}
echo "\n";
for ($a = $b = 0; $b < 2 || $a < 1; $a++, $b++) {
	echo "loop 4, iteration $a\n";
}
echo "\n";
?>

Expected result:
----------------
loop 1, iteration 0
loop 1, iteration 1

loop 2, iteration 0
loop 2, iteration 1

loop 3, iteration 0
loop 3, iteration 1

loop 4, iteration 0
loop 4, iteration 1

Actual result:
--------------
loop 1, iteration 0
loop 1, iteration 1

loop 2, iteration 0

loop 3, iteration 0
loop 3, iteration 1

loop 4, iteration 0
loop 4, iteration 1