PHP Design Welfare Lottery Lucky Number Automatic Generator_PHP Tutorial

Using PHP completely random design, each refresh will have different lucky numbers, give it a try, don’t forget neo when you get rich~~~
for ($n=1;$n<=5;$n ) {
echo "No.".$n."Note ";
$string="";//Initialization string
for ($i=1;$i<=7;$i ) {
mt_srand((double)microtime()*1000000);//Add the time factor to the millionth of a second during execution when the random number seed
$random=mt_rand(1,30);//Generate random numbers between 1-30
if (eregi($random,$string)){//Check whether this number already exists
$i--;
continue;//Jump out of the loop and return to the starting point of the judgment.
}
else{
$string=$string.",".$random;
echo $random," ";}
}
echo "
";
}
?>