function randsurname() {
$handle = "sn.txt";
if ($handle) {

       $buffer = file($handle);
       $a = rand(0, count($buffer));
       $surname = $buffer[$a];
       return $surname;
 }
}

function selfile ($j) {
if ($j = '1') { $handle2 = "females.txt"; }
if ($j = '2') { $handle2 = "males.txt"; }

    if ($handle2) {
    
            $buffer2 = file($handle2);
            $b = rand(0, count($buffer2)) ;
            $name = $buffer2[$b];
            return $name;
     }
}
 
function randperson() {
  $which = mt_rand (1,2);
  $name = selfile ($which);
  $surname = randsurname();
  $person = $name . $surname;
  return $person;
}

echo "Name is : $name";

echo "Person is " .randperson()