Conceitual idea about switch and regex

gistfile1.php

<?php
	$str = '[0710:020602938:7041]';

	preg_switch($str) {
		case '/^(\[)[A-Z0-9]{4}:(' . rand(10000,29999) . '|' . rand(50000,99999) . '):[A-z]{3}(\])(.*)+/':
			/* ... */
			break;
		case '/^(\[)[A-Z0-9]{4}:[0-9]{9}:[0-9]{4}(\])+/':
			/* ... */
			break;
		default:
			/* ... */
			break;
	}