Mise à jour de la base de données et update en MySQL pas valide

Bonjour,

1 - Tu utilises l'ancienne extension mysql.....
Merci de lire ceci : https://www.commentcamarche.net/faq/43261-php-l-extension-mysql-est-obsolete#top

Puis de passer à PDO ou à mysqli

2 - Si tu fais un echo de ta requête :

"UPDATE articles set titre='$titre', short='$short', chapeau='$chapeau', article='$article', video='$video' WHERE id='$id'"

Qu'est-ce que ça t'affiche ?
=> Si tu testes ta requête DIRECTEMENT dans ta BDD ... est-ce qu'elle fonctionne ?

En PDO tu peux utiliser des blocs TRY/CATCH pour intercepter les erreurs de requêtes...
En Mysqli tu as la possibilité d'utiliser mysqli_error
(Et avec l'ancienne extension mysql... mysql_error )

Le code n'est pas fou à voir, mais si tu veux je peux le linker :)
je te passe la connexion a la BDD

<form style="margin: 0 auto; width:50%" action="admin-mod-article.php">

<?
require("../config/config.inc.php");
$db = mysql_connect("$dbhost", "$dblogin", "$dbpass") OR DIE("Base de données inaccessible.");
mysql_select_db("$dbbase",$db) OR DIE("Base de données inaccessible.");

$req_cars = mysql_query("SELECT * FROM articles ORDER BY id DESC");
$res_societe = mysql_num_rows($req_cars);

echo "<SELECT class=\"form-control center-block\" name=\"id\">";
 for($i=0 ; $i < $res_societe; $i++) {
   $id = mysql_result($req_cars,$i,"id");
   $titre = mysql_result($req_cars,$i,"titre");
            $date  = mysql_result($req_cars,$i,"date");
   $short = mysql_result($req_cars,$i,"short");
   $chapeau = mysql_result($req_cars,$i,"chapeau");
   $article = mysql_result($req_cars,$i,"article");
   $img1 = mysql_result($req_cars,$i,"img1");
            $img2   = mysql_result($req_cars,$i,"img2");
            $img3   = mysql_result($req_cars,$i,"img3");
            $img4   = mysql_result($req_cars,$i,"img4");
            $img5   = mysql_result($req_cars,$i,"img5");
            $img6   = mysql_result($req_cars,$i,"img6");
            $img7   = mysql_result($req_cars,$i,"img7");
            $img8   = mysql_result($req_cars,$i,"img8");
            $img9   = mysql_result($req_cars,$i,"img9");
            $img10   = mysql_result($req_cars,$i,"img10");
   $video = mysql_result($req_cars,$i,"video");

   echo "<OPTION value=\"$id\">$id - $titre - $date</OPTION>";
 }
?>
</SELECT> 
<br><input type="submit" class="btn btn-primary center-block" value="Modifier cet article">
</form>

<hr>
  <?
$id = $_GET['id'];

if ($id!=""){
 $req_cars = mysql_query("SELECT * FROM articles WHERE id=$id");
   $id  = mysql_result($req_cars,0,"id");
            $titre  = mysql_result($req_cars,0,"titre");
            $date  = mysql_result($req_cars,0,"date");
            $short  = mysql_result($req_cars,0,"short");
            $chapeau    = mysql_result($req_cars,0,"chapeau");
            $article    = mysql_result($req_cars,0,"article");
            $img1   = mysql_result($req_cars,0,"img1");
            $img2   = mysql_result($req_cars,0,"img2");
            $img3   = mysql_result($req_cars,0,"img3");
            $img4   = mysql_result($req_cars,0,"img4");
            $img5   = mysql_result($req_cars,0,"img5");
            $img6   = mysql_result($req_cars,0,"img6");
            $img7   = mysql_result($req_cars,0,"img7");
            $img8   = mysql_result($req_cars,0,"img8");
            $img9   = mysql_result($req_cars,0,"img9");
            $img10   = mysql_result($req_cars,0,"img10");
            $video  = mysql_result($req_cars,0,"video");

?>

<form action="admin-mod-article2.php" method="post" name="form" enctype="multipart/form-data">

        <p><strong>ID</strong>* : <? echo $id; ?></p>

        <p><strong>Date </strong>* : <? echo $date; ?></p>
        
        <fieldset class="form-group">
        <label for="titre">titre :</label>
        <input type="text" class="form-control" name="titre" id="titre" value="<? echo $titre; ?>" placeholder="titre" size="20" maxlength="255">
        </fieldset>

        <fieldset class="form-group">
    <label for="short">Résumé :</label>
     <textarea name="short" rows="3" class="form-control" ><? echo $short; ?></textarea>
    </fieldset>

    <fieldset class="form-group">
    <label for="chapeau">Chapeau :</label>
     <textarea name="chapeau" rows="5" class="form-control" ><? echo $chapeau; ?></textarea>
    </fieldset>

    <fieldset class="form-group">
    <label for="article">Article :</label>
     <textarea name="article" rows="35" class="form-control" ><? $article=str_replace('<br />', '', $article); echo $article; ?></textarea>
    </fieldset>

    <fieldset class="form-group">
            <label for="img1">img1 </label>
              <? if ($img1!="") { ?> <img src="<? echo $img1; ?>" class="img-responsive imgstaff"><br>  <? } ?>photo 1  
               <input type="file" class="form-control-file" name="img[]" value="<? echo $img1; ?>" />
            <br /><br />
            <label for="img2">img2</label>
              <? if ($img2!="") { ?> <img src="<? echo $img2; ?>" class="img-responsive imgstaff"><br>  <? } ?>photo 2  
               <input type="file" class="form-control-file" name="img[]" value="<? echo $img2; ?>" />
            <br /><br />
            <label for="img3">img3</label>
              <? if ($img3!="") { ?> <img src="<? echo $img3; ?>" class="img-responsive imgstaff"><br>  <? } ?>photo 3 
               <input type="file" class="form-control-file" name="img[]" value="<? echo $img3; ?>" />
            <br /><br />
            <label for="img4">img 4</label>
              <? if ($img4!="") { ?> <img src="<? echo $img4; ?>" class="img-responsive imgstaff"><br>  <? } ?>photo 4 
               <input type="file" class="form-control-file" name="img[]" value="<? echo $img4; ?>" />
            <br /><br />
             <label for="img5">img5</label>
              <? if ($img5!="") { ?> <img src="<? echo $img5; ?>" class="img-responsive imgstaff"><br>  <? } ?>photo 5
               <input type="file" class="form-control-file" name="img[]" value="<? echo $img5; ?>" />
            <br /><br />
            <label for="img6">img6</label>
              <? if ($img6!="") { ?> <img src="<? echo $img6; ?>" class="img-responsive imgstaff"><br>  <? } ?>photo 6 
               <input type="file" class="form-control-file" name="img[]" value="<? echo $img6; ?>" />
            <br /><br />
               <label for="img7">img7</label>
              <? if ($img7!="") { ?> <img src="<? echo $img7; ?>" class="img-responsive imgstaff"><br>  <? } ?>photo 7
               <input type="file" class="form-control-file" name="img[]" value="<? echo $img7; ?>" />
            <br /><br />
               <label for="img8">img8</label>
              <? if ($img8!="") { ?> <img src="<? echo $img8; ?>" class="img-responsive imgstaff"><br>  <? } ?>photo 8
               <input type="file" class="form-control-file" name="img[]" value="<? echo $img8; ?>" />
            <br /><br />
               <label for="img9">img9</label>
              <? if ($img9!="") { ?> <img src="<? echo $img9; ?>" class="img-responsive imgstaff"><br>  <? } ?>photo 9
               <input type="file" class="form-control-file" name="img[]" value="<? echo $img9; ?>" />
            <br /><br />
               <label for="img10">img10</label>
              <? if ($img10!="") { ?> <img src="<? echo $img10; ?>" class="img-responsive imgstaff"><br>  <? } ?>photo 10
               <input type="file" class="form-control-file" name="img[]" value="<? echo $img10; ?>" />
           </fieldset>

        
  <p>
    <input name="go" type="hidden" value="1">
    <input type="hidden" name="MAX_FILE_SIZE" value="500000">
    <input name="id" type="hidden" value="<? echo $id; ?>">
    <? echo "id n° : " .$id; ?>
    <br>
    <input name="maj" class="btn btn-primary center-block" type="submit" value="Modifier cet article">
  </p>
</form>

EDIT : Ajout des balises de code (la coloration syntaxique). Explications disponibles ici :ICI Merci d'y penser dans tes prochains messages.