Same values on rand() function wit for loop - PHP

I'm trying to generate 10 different number with rand() function using for loop. My codes:

    <?php

$rand = rand();

for ($i=1 ; $i<=10 ; $i++){
    echo $rand."\n";
}
?>

But when I run my code output something like that:

4481
4481
4481
4481
4481
4481
4481
4481
4481
4481

All 10 values are same, but I want to get all of them different.

In C, there is a srand(time(NULL)) code to prevent from this, what is the alternative solution in PHP?

Thanks.