Barre de recherche

$articles=$conn->query('SELECT * FROM Medecin ORDER BY Num_med DESC');

if(isset($_GET['q']) AND !empty($_GET['q'])){
 $q=htmlspecialchars($_GET['q']);
$q_array=explode('',$q);

var_dump($q);
var_dump($q_array);
$articles=$conn->query('SELECT * FROM Medecin WHERE Nom_med LIKE "%'.$q.'%"ORDER BY Nom_med');
}            
  ?>           
 <form methode ="GET">
  <input  placeholder="Recherche..." type="search" value="" name="q">
  <input type="submit" value="valider">
 </form>

<?php

if ($articles->rowCount() > 0) {
    // output data of each row
    while($a = $articles->fetch()) {
        echo '<tr><td>'.'<input type="radio" name="motif" value="Num_med" style="float:right">'.
        '</td><td>'.$a['Num_med'] .'</td><td>'.$a['Nom_med'].'</td><td>'.$a['Prenom_med'].
        '</td><td>'.$a['Email_med'].'</td></tr>';
    } 
}

 else { ?> aucun résultat!!

 <?php } 



$conn->close();
?>