Fill Board function for PHP Word Search app

fillBoard.php

function fillBoard() {
	//fill board with list by calling addWord for each word
	//or return false if failed
	global $word;
	$direction = array("N", "S", "E", "W");
	$itWorked = TRUE;
	$counter = 0;
	$keepGoing = TRUE;

	while ($keepGoing) {
		$dir = rand(0,3);
		$result = addWord($word[$counter], $direction[$dir]);
		if ($result == FALSE) {
			// print "failed to place $word[$counter]";
			$keepGoing = FALSE;
			$itWorked = FALSE;
		} //end if no result check
		$counter++;
		if ($counter >= count($word)) {
			$keepGoing = FALSE;
		} // end if
	} // end while
	return $itWorked;
} // end fill board