取字串亂數

$number1=randomkeys(3,"ABDEFGHJKLMNPQRSTVWXYZ");
$number2=randomkeys(3,"1234567890");

function randomkeys($len=6,$chars="ABDEFGHJKLMNPQRSTVWXYZ123456789") 
{ 

// characters to build the password from 
mt_srand((double)microtime()*1000000*getmypid()); 
// seed the random number generater (must be done) 
$password=""; 
while(strlen($password)<$len) 
$password.=substr($chars,(mt_rand()%strlen($chars)),1); 
return $password; 
}

Other