Insert only the filled line in php

I have this code:

<?php

$j=0;

    while($rows_cursos = mysqli_fetch_array($resultado_cursos)) {


$tabela1 .= '<tr>';

$tabela1 .= '<td> <input type="text" size="45" name= "NomeUtente[]" id= "NomeUtente" value="'.$rows_cursos['nome'].'"></td>';

$tabela1 .= '<td> <input type="text" size="1" name= "Quarto[]" id= "Quarto" value="'.$rows_cursos['Quarto'].'"></td>';

$tabela1 .= '<td> <input type="datetime" name= "DataRegisto[]" id= "DataRegisto" value="'. date("Y-m-d H:i:s") .'"></td>';

$tabela1 .= '<td> <input type="checkbox" name= "Miccao['.$j.']"> Realizado <input type="text" name= "Tipo1[]" id= "Tipo1" size="30" ></td>';

$tabela1 .= '<td> <input type="checkbox" name= "Dejeccao['.$j.']"> Realizado <input type="text" name= "Tipo[]" id= "Tipo" size="30" ></td>';

$tabela1 .= '<td> <select name="Colaborador[]" id="Colaborador">
   <option value="xxxxxxxxxxxx">xxxxxxxxxxxxx</option>
</select></td>';

$tabela1 .= '</tr>'; 

$j++;
    }

$tabela1 .='</tbody>'; 

$tabela1 .= '</table>';

$tabela1 .= '</div>';



echo "<form method='POST' action=''>";
echo $tabela1;   

echo "<input type='submit' name='registar' value='Registo'>";

echo "</form>";

echo "</br>";
echo "</br>";

?>

To insert I have the following:

<?php  
if(isset($_POST['registar']))
{
$NomeUtente = $_POST['NomeUtente'];

for ($i=0;$i<count($_POST["NomeUtente"]);$i++) { 
$utente = $_POST['NomeUtente'][$i]; 
$quarto = $_POST['Quarto'][$i]; 
$data = $_POST['DataRegisto'][$i]; 
$miccao = $_POST['Miccao'][$i]; 
$tipo1 = $_POST['Tipo1'][$i]; 
$dejeccao = $_POST['Dejeccao'][$i]; 
$tipo = $_POST['Tipo'][$i]; 
$colaborador = $_POST['Colaborador'][$i]; 

$miccao = $miccao == "on" ? "Realizado" : ""; 
$dejeccao = $dejeccao == "on" ? "Realizado" : ""; 

    $sql = "INSERT INTO registoMiDe (NomeUtente, Quarto, DataRegisto, Miccao, Tipo1, Dejeccao, Tipo, Colaborador) VALUES ('$utente', '$quarto', '$data', '$hora', '$miccao', '$tipo1', '$dejeccao', '$tipo', '$colaborador')"; 
$res = mysqli_query($conn,$sql); 

}
}
?>

Now I should only insert in the table the rows in which I select one or both checkboxes, but this is inserting the rows all when I make register in the table of the database. It was working fine, as long as it did not display the value in the DataRegist field

This was the change I made and it did not work:

$tabela1 .= '<td> <input type="datetime-local" name= "DataRegisto[]" id= "DataRegisto" ></td>'; 

for

$tabela1 .= '<td> <input type="datetime" name= "DataRegisto[]" id= "DataRegisto" value="'. date("Y-m-d H:i:s") .'"></td>';