Problem when inserting data into DB

Hi everyone!

I do not know what happened to my code, I have trouble inserting data into the database and yet I have no errors

here is my code:

include_once('config.php');
if(isset($_POST['submit'])){
$nom=isset($_POST['nom']);
$prenom=isset($_POST['prenom']);
$phone=isset($_POST['phone']);
$naissance=isset($_POST['naissance']);
$lieu=isset($_POST['lieu']);
$nationalite=isset($_POST['nationalite']);
$passport=isset($_POST['passport']);
$ckckl[]=isset($_POST['chkl[]']) ;
$tmp=isset($_FILES['photo']['tmp_name']);
$img=isset($_FILES['photo']['name']);
$type=isset($_FILES['photo']['type']);
if (is_uploaded_file($tmp)) {
if (!strstr($type,'jpg') && !strstr($type,'png')){
echo "Ooops! veuillez choisir une image";
}
if (!move_uploaded_file($tmp,"./dist/img/$img")) {
echo "Désolé,destinantion non trouvée!";
}
$query="INSERT INTO pelerin (nom,prenom,genre,dateNaissance,lieuNaissance,nationalite,numPassport,photo) VALUES ('".$nom."','".$prenom."','".$genre."','".$phone."','".$naissance."','".$lieu."','".$nationalite."','".$passport."','".$img."')";
mysqli_query($conn,$query);
echo "Record is inserted";
}
}
?>

"form" action="insert.php" method="post">
class="box-body">
class="form-group">
for="exampleInputName">Nom
"text" class="form-control" id="exampleInputName" placeholder="Entrer le nom" name="nom">

class="form-group">

for="exampleInputPrenom">Prénom

"text" class="form-control" id="exampleInputPrenom" placeholder="Entrer le prénom" name="prenom">

class="form-group">

for="exampleInputGenre">Genre

class="checkbox-inline">

"checkbox" value="" name="ckckl[]">M

class="checkbox-inline">

"checkbox" value="" name="ckckl[]">F

class="form-group">

for="exampleInputPhone">Téléphone

"numbre" class="form-control" id="exampleInputPhone" placeholder="Entrer le téléphone" name="phone">