เสี่ยงทาย/สุ่มเลือก

<?php

echo "test random<br/>\n";
echo "1 - ".substr(str_shuffle('ABCDEFGHIJKLMNOPQRSTUVWXYZ23456789'),0,5)."<br/>\n";
echo "2 - ",md5(time())."<br/>\n";
echo "3 - ",md5(microtime())."<br/>\n";

srand((double) microtime() * 1000000);
echo "4 - ".rand(0,99999)."<br/>\n";
?>