form inputan

<?php
$array    = json_decode($_POST['data_filght'], true);
$search   = json_decode($_POST['search'], true);
$adult    = $search['adult'];
$children = $search['children'];
$infant   = $search['infant'];
$flight   = $array['Flight_Detail'];
function gender($name='Contact_Name_Salutation'){
  $gender=array('MR','MRS','MISS');
  $result='';
  $result.="<select name='{$name}'>";
  foreach($gender as $s) $result.="<option value='{$s}'>{$s}</option>";
  $result.="</select>";
  return $result;
}
?>
<form action="book.php" method="post">
  <table>
  <tr><td><font size="3" color="red">Pemesanan</font></td></tr>
  <tr>
    <td>Jenis Kelamin</td>
    <td>:</td>
    <td><?php echo gender();?></td>
  </tr>
  <tr><td>First Name</td><td>:</td><td><input type="text" name="Contact_First_Name"></td></tr>
  <tr><td>Last Name</td><td>:</td><td><input type="text" name="Contact_Last_Name"></td></tr>
  <tr><td>Phone</td><td>:</td><td><input type="text" name="Contact_Phone"></td></tr>
  <tr><td>Email</td><td>:</td><td><input type="text" name="Contact_Email"></td></tr>
  <tr><td colspan='3'><textarea name='data_filght'><?php echo $_POST['data_filght'];?></textarea></td></tr>
  <tr><td colspan='3'><textarea name='search' ><?php echo $_POST['search'];?></textarea></td></tr>
  <tr><td colspan='3'><input type='text' name='session' value='<?php echo $_POST['session'];?>'></td></tr>
<?php
if (!empty($adult)){?>
  <tr><td colspan='3'><font size="3" color="red">Adult</font></td></tr>
  <?php
   for ($i=0;$i<$adult;$i++){
     echo '<tr><td>Jenis Kelamin</td><td>:</td><td>';
     gender("Adult[{$i}][Salutation]");
     echo "</td></tr>
           <tr><td>First Name</td><td>:</td><td><input type=text' name='Adult[{$i}][First_Name]'></td></tr>
           <tr><td>Last Name</td><td>:</td><td><input type='text' name='Adult[{$i}][Last_Name]'></td></tr>
           <tr><td>Phone</td><td>:</td><td><input type='text' name='Adult[{$i}][Phone_Number]'></td></tr>
           <tr><td>Email</td><td>:</td><td><input type='text' name='Adult[{$i}][Email]'></td></tr>";
   }
}
if (!empty($children)){?>
  <tr><td colspan='3'><font size="3" color="red">Children</font></td></tr>
  <?php
  for ($i=0;$i<$children;$i++){
        echo "<tr><td>Jenis Kelamin</td><td>:</td><td>".gender("Children[{$i}][Salutation]")."</td></tr>
             <tr><td>First Name</td><td>:</td><td><input type='text' name='Children[{$i}][First_Name]'></td></tr>
             <tr><td>Last Name</td><td>:</td><td><input type='text' name='Children[{$i}][Last_Name]'></td></tr>
             <tr><td>Phone</td><td>:</td><td><input type='text' name='Children[{$i}][Phone_Number]'></td></tr>
             <tr><td>Email</td><td>:</td><td><input type='text' name='Children[{$i}][Email]'></td></tr>
             <tr><td>Birth Day</td><td>:</td><td><input type='text' name='Children[{$i}][Birthday]'></td></tr>";
  }
}
if (!empty($infant)){?>
  <tr> <td><font size="3" color="red">Infant</font></td></tr>
  <?php
  for ($i=0;$i<$infant;$i++){
        echo "<tr><td>Jenis Kelamin</td><td>:</td><td>".gender("Infant[{$i}][Salutation]")."</td></tr>
             <tr><td>First Name</td><td>:</td><td><input type='text' name='Infant[{$i}][First_Name]'></td></tr>
             <tr><td>Last Name</td><td>:</td><td><input type='text' name='Infant[{$i}][Last_Name]'></td></tr>
             <tr><td>Birth Day</td><td>:</td><td><input type='text' name='Infant[{$i}][Birthday]'></td></tr>";
  }
};
?>
  <tr><td colspan="3"><input type="submit" value="Submit"></td></tr>
  </table>
</form>