/**
* Create random value on give criteria
*
* @param int $length
* @param string $type (mixed, chars, digits)
* @return string
*/
function generateRandomString($length, $type = null)
{
if ($length === null) {
$length = 12;
}
if ($type === null) {
$type = 'mixed';
}
if ($type != 'mixed' && $type != 'chars' && $type != 'digits') {
return false;
}
$rand_value = '';
while (strlen($rand_value) < $length) {
if ($type == 'digits') {
$char = myRand(0, 9);
} else {
$char = chr(myRand(0, 255));
}
if ($type == 'mixed') {
if (preg_match('/^[a-z0-9]$/i', $char)) {
$rand_value .= $char;
}
} elseif ($type == 'chars') {
if (preg_match('/^[a-z]$/i', $char)) {
$rand_value .= $char;
}
} elseif ($type == 'digits') {
if (preg_match('^[0-9]$', $char)) {
$rand_value .= $char;
}
}
}
return $rand_value;
}
function a_star_test()
{
$map = myArrayFill(0, NODE_HEIGHT, myStrRepeat('A', NODE_WIDTH));
generate(node(myRand(1, (NODE_WIDTH + NODE_WIDTH % 2) / 2 - 1) * 2 - 1, myRand(1, (NODE_HEIGHT + NODE_HEIGHT % 2) / 2 - 1) * 2 - 1), $map);
$start = node(1, 1);
$target = node(NODE_WIDTH + NODE_WIDTH % 2 - 3, NODE_HEIGHT + NODE_HEIGHT % 2 - 3);
$path = a_star($start, $target, $map);
myArrayUnshift($path, $start);
foreach ($path as $i) {
$arr = coord($i);
$map[$arr[0]][$arr[1]] = '*';
}
return null;
}
