didats

function validate_civilid($str) {
	$valid = false;
			
	if(preg_match("/[0-9]/{12}", $str)) {
		$test = ((substr($str, 0, 1) * 2) + ((substr($str, 1, 1) * 1) + ((substr($str, 2, 1) * 6) + ((substr($str, 3, 1) * 3) + ((substr($str, 4, 1) * 7) + ((substr($str, 5, 1) * 9) + ((substr($str, 6, 1) * 10) + ((substr($str, 7, 1) * 5) + ((substr($str, 8, 1) * 8) + ((substr($str, 9, 1) * 4) + ((substr($str, 10, 1) * 2) ) % 11;
				
		if($test == substr($str, 11, 1)) $valid = true;
	}
			
	return $valid;

didats

-(BOOL) validateCivilID:(NSString *)civilID {
    bool valid = false;
    
    NSString *regex = @"[0-9]{12}";
    NSPredicate *test = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    
    if ([test evaluateWithObject:civilID]) {
        
        double test = 11 - (([[civilID substringWithRange:NSMakeRange(0, 1)] integerValue] * 2) +
                            ([[civilID substringWithRange:NSMakeRange(1, 1)] integerValue] * 1) +