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@ 2013-07-08T22:12:21Z

<?php
function MakeCouponCode() {
  $res = "";
  for($i = 0; $i < 7; ++$i)
    $res .= chr(mt_rand(0, 1) == 0 ? mt_rand(65, 90) : mt_rand(48, 57));
  return $res;
}

$coupons = array();
for($i = 0; $i < 5; ++$i)
  $coupons[] = MakeCouponCode();

print_r($coupons);

Output
Performance
VLD
References
Branches

chr: documentation ( source)
mt_rand: documentation ( source)
print_r: documentation ( source)

preferences:dark modelive preview

36.86 ms | 402 KiB | 5 Q