temp

gistfile1.php

function solution($A) {
  asort($A);
  $B = array();
  foreach($A as $value){
    $B[] = $value;  
  }
  foreach($B as $index => $value){    
    if (($B[$index+1] != ($value+1)) && ($B[$index+1] != $value)) {
      return $value + 1;
    }
  }
}