< php
function aaa_a($length){
srand(date(‘s’));
$bbb=’ABCDEFGhijklmNOPQRSTuvwxYz’;
$string =”;
while(strlen($string)<$length){

$string = substr($bbb,(rand()%(strlen($bbb))),1);

}
return($string);

}
echo saaa_a(8);
>
A. abCHUvwx B. ABjiRQxz C.vmxZGhij. D.EGSvTYxz