<?php

$num = 500;

$conn=array();
print "opening $num connections\n";
for($i=0;$i<$num;$i++)
{
        $conn[$i] = mysqli_connect("127.0.0.1","root","") or die("cannot connect");
        print "$i\n";
}
print "closing $num connections\n";
for($i=0;$i<$num;$i++)
{
        mysqli_close($conn[$i]);
}

?>