Ajax Scroll (fetch.php)

fetch.php


<?php
include('converte_data.php');
if(isset($_POST["limit"], $_POST["start"]))
{
 $connect = mysqli_connect("host", "usuario", "senha", "banco de dados");
 $query = "SELECT * FROM imagem ORDER BY id DESC LIMIT ".$_POST["start"].", ".$_POST["limit"]."";
 $result = mysqli_query($connect, $query);
 while($row = mysqli_fetch_array($result))

 { ?>
    <div class="row">
                <?php
                    $cont = 0;
                    foreach ($result as $foto) {
                        $cont++;
                    ?>
                <div class="col-sm-4">
                    <div class="shadow p-3 mb-5 bg-white rounded">
                        <?php echo converte_data($foto['data']); ?><br>
                        <?php echo "".$foto["assunto"]?><br>
                        <a href="<?php echo $foto["url"]; ?>" target="_blank"><img src="imagens/<?php echo $foto["nome"]; ?>" width="100%" class="img-fluid"></a><br>
                        <div class="descricao">
                        <?php echo substr(nl2br($foto['descricao']), 0, 43); ?>...<br>
                        </div>
                    </div>
                </div>
                <?php
                    if($cont ==3){
                        echo "</div>";
                        echo "<div class='row'>";
                        $cont = 0;
                    }
                    }
                    ?>
            </div>
            <?php
                ?>
<?php
 }
}

?>