Php generate random severeal numbers one time

srand((double)microtime()*1000000);
$random_number1 = rand(1,60);
echo (”$random_number1
“);
$random_number2 = rand(1,60);
echo (”$random_number2
“);
$random_number3 = rand(1,60);
echo (”$random_number3
“);
$random_number4 = rand(1,60);
echo (”$random_number4
“);
$random_number5 = rand(1,60);
echo (”$random_number5
“);

$r = array(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t);
for ($i=0;$i<17;$i++) { $n = rand(0,17); echo $r[$n];