$stmt = $bdd->prepare("SELECT id, titre, img FROM `fiche_film`");

<?php
    $stmt = $bdd->prepare("SELECT id, titre, img FROM `fiche_film` WHERE `active` = '1'  ORDER BY `id` ASC LIMIT 0,20");
    if (!$stmt->execute()) {
        echo 'ERREUR';
        exit; //pas obligatoire
    }
    while ($getAffiche = $stmt->fetch()) {?>
	<?php
$lien = $getAffiche['img']; //image a verifier
$lien_image_empty = "./images/icons/no_affiche_film.jpg"; //image a afficher si vide

$handle = curl_init($lien);

curl_setopt($handle,  CURLOPT_RETURNTRANSFER, TRUE);

/* Get the HTML or whatever is linked in $url. */
$response = curl_exec($handle);

/* Check for 404 (file not found). */
$httpCode = curl_getinfo($handle, CURLINFO_HTTP_CODE);
if($httpCode == 404) {
    /* Handle 404 here. */
    echo '<div class="collection"><img src=" '.$lien_image_empty.' " title=" '.$getAffiche['titre'].' " width="148" height="197" class="img-indent"></div>';
}
curl_close($handle);

/* Handle $response here. */?>
   <?php } ?>

$handle = curl_init($url);
curl_setopt($handle,  CURLOPT_RETURNTRANSFER, TRUE);

/* Get the HTML or whatever is linked in $url. */
$response = curl_exec($handle);

/* Check for 404 (file not found). */
$httpCode = curl_getinfo($handle, CURLINFO_HTTP_CODE);
if($httpCode == 404) {
    /* Handle 404 here. */
}

curl_close($handle);

/* Handle $response here. */

<?php
    $stmt = $bdd->prepare("SELECT id, titre, img FROM `film` WHERE `active` = '1'  ORDER BY `id` ASC LIMIT 0,20");
    if (!$stmt->execute()) {
        echo 'ERREUR';
        exit; //pas obligatoire
    }
    while ($getAffiche = $stmt->fetch()) {
<div class="collection">
      <img src="<?=$getAffiche ['img']; ?>" title="<?=$getAffiche ['titre']; ?>" alt="" width="120" height="158">
   </div>
    }
?>