如何在preg_match上有不同的规则？

Let's assume we have couple of inputs: 1-west:726435632:9236
2-west:8463758:873648
green:8234682:92347
red:98374:98374
H09

For output I want to have:
1. if it was anything other than H, just pass the first part like
1-west:283647873:86324873---->1-west

2. if it was anything started with H, pass HOLDING as output:
   H06--->HOLDING

Can anybody help me how to implement this?

Something like this ?

function check($string) {
    $test = preg_match('/^H./', $string);
    if ($test) {
        return 'HOLDING';
    }
    $parts = explode(':', $string);
    return $parts[0];
}

Or in one line (assuming $input contains your input)

$output = preg_match('/^H./', $input) ? 'HOLDING' : substr($input, 0, strpos($input, ":"));

Really don't need regex here -

    foreach ($arrayOfStrings as $row)
    {

        (if substr($row, 0, 1) == "H")
        {
            echo "Holding";
        } else {
            echo substr($row, 0, strpos($row, ":"));
        }

}