How to update several php postgresql records?

Question

I need to update several records at the same time with php/postgresql (also for mysql) through a checkbox and textbox but I’m not getting it.
The code below only updates the sequence field of the last record and does not update the status. The remaining records, nothing is updated.
My code:

<form action="" method="post" name="form" style="width:100%; height:100%;">
<div style="overflow-y:scroll; width:100%; height:90%;">
<?php
$query = pg_query($dbconn,"select *, case when idstatus = 1 then 'checked=\"checked\"' else '' end as status1 from tabela") or die(pg_last_error($dbconn));
?>
<table width="100%" border="0" cellspacing="20" cellpadding="0" align="center">
  <tr>
    <?php
    $loop = 3;
    $i = 1;
    while($queryRow = pg_fetch_array($query)){        
      if($i < $loop){
              echo '
              <td valign="middle" align="center">                                         
              <img src="imagem/'.$queryRow['imagem'].'" width="250" height="150" /><br />
              <p>
              <table width="250" border="0" cellspacing="5" cellpadding="0">
                <tr>
                  <td align="right" valign="middle" width="33%">STATUS</td>
                  <td style="padding:5px;" align="left" valign="middle" width="33%"><input name="status" type="checkbox" value=1" '.$queryRow ['status1'].' /></td>
                  <td style="padding:5px;" align="center" valign="middle" width="34%"><input name="sequencia" type="text" value="'.$queryRow['sequencia'].'" /><input name="id" type="hidden" value="'.$queryRow['id'].'" /></td>
                </tr>
              </table>
              </p>              
              </td>
              ';
      }elseif($i = $loop){                    
              echo '                                            
              <td valign="middle" align="center">                                         
              <img src="imagem/'.$queryRow['imagem'].'" width="250" height="150" /><br />
              <p>
              <table width="250" border="0" cellspacing="5" cellpadding="0">
                <tr>
                  <td align="right" valign="middle" width="33%">STATUS</td>
                  <td style="padding:5px;" align="left" valign="middle" width="33%"><input name="status" type="checkbox" value=1" '.$queryRow ['status1'].' /></td>
                  <td style="padding:5px;" align="center" valign="middle" width="34%"><input name="sequencia" type="text" value="'.$queryRow['sequencia'].'" /><input name="id" type="hidden" value="'.$queryRow['id'].'" /></td>
                </tr>
              </table>
              </p>              
              </td>
                </tr>
              </table>
              </p>  
              </td>
              </tr>
              <tr>
              ';
      $i = 0;
      }
    $i++;
    }
    ?>
  </tr>
</table>
</div>
<div style="width:100%; height:10%; background:none;">
<table width="100%" height="100%" border="0" cellspacing="5" cellpadding="0" style="border-top:#000099 solid 3px;">
  <tr>
    <td align="center" valign="middle"><button>ATUALIZAR</button></td>
  </tr>
</table>    
</div>
<?php
if(isset($_POST)){
    $count = count($_POST['id']); 
    $i = 0; 

    while ($i < $count) { 
        $id = $_POST['id'][$i]; 
        $status = $_POST['status'][$i];
        $sequencia = $_POST['sequencia'][$i]; 

        $query = pg_query($dbconn,"update tabela set status = $status, sequencia = $sequencia where id = $id") or die(pg_last_error($dbconn));
        echo '<META HTTP-EQUIV="Refresh" Content="0; URL=index.php">';
        ++$i; 
    }
}           
?> 
</form>