[Vince]

PHP код:

stock minrandom(min, max)
    return min + random(max - min); 


PHP код:

new randomString[10];
for(new i; i < sizeof randomString; i++)
{
    randomString[i] = minrandom('A', 'Z');
} 


If you also want lowercase letters and numbers then you can use another call to random to randomize that, too.