PHP basit array sorunum

<form method="get" > 
   
   
  Özellikleriniz: <input type="text" name="ozel1" /><br /> 
  Doğum  tarihiniz: <select name="dogum1"> 
  <?php 
   
  for($i=1960;$i<=2013;$i++){ 
      echo "".$i.""."
"; 
  } 
   
  ?><br /> 
  </select> 
  <input type="submit" value="giriş" /> 
   
   
  </form> 
   
   
   
  <?php 
   
  $ozzel1= htmlspecialchars($_GET["ozel1"]); 
  $doggum1=htmlspecialchars($_GET["dogum1"]); 
  $ozel1= explode(" ",$ozzel1); 
  $dogum1= explode(" ",$doggum1); 
   
  print_r($ozel1); 
  print_r($dogum1); 
   
   
  ?>

<form method="get" > 
   
   
  Özellikleriniz: <input type="text" name="ozel2" /><br /> 
  Doğum  tarihiniz: <select name="dogum2"> 
  <?php 
   
  for($i=1960;$i<=2013;$i++){ 
      echo "<option value=".$i." >".$i."</option>"."<br />"; 
  } 
   
  ?><br /> 
  </select> 
  <input type="submit" value="giriş" /> 
   
   
  </form> 
   
   
   
  <?php 
   
  $ozzel2= htmlspecialchars($_GET["ozel2"]); 
  $doggum2=htmlspecialchars($_GET["dogum2"]); 
  $ozel2= explode(" ",$ozzel2); 
  $dogum2= explode(" ",$doggum2); 
   
  print_r($ozel2); 
  print_r($dogum2); 
   
   
   
  ?>

<?php 
   
  include_once 'ortak1.php'; 
  include_once 'ortak2.php'; 
   
  $ortak= array_intersect("$ozel1","$ozel2"); 
  print_r($ortak); 
   
   
   
  ?>