Welfare lottery Lucky Number automatic generator

Using PHP completely random design, each refresh has a different lucky number, try, made a fortune don't forget Neo Oh ~ ~ ~
<?php
For ($n =1 $n <=5; $n + +) {
echo "section" $n. " Note ";
$string = "";//Initialize string
For ($i =1 $i <=7; $i + +) {
Mt_srand ((double) Microtime () *1000000);//Add time factor to execute one out of 10,000 seconds when disorderly number of seeds
$random =mt_rand (1,30);//generating 1-30 random numbers
if (eregi ($random, $string)) {//Check if this number already exists
$i--;
continue;//out of circulation and back to the beginning of judgment.
}
else{
$string = $string. ",". $random;
echo $random, "";}
}
echo "<BR>";
}
?>