Block Spéparé

Si j'ai bien compris ce que tu souhaite c'est d'afficher tes produits sous forme de grille ? Si c'est bien celà, dans ce czs tu as énormement de grille en css déjà faite et un tutoriel sur Grafikart :)

Je n'y arrive pas avec les grilles tout va à la verticale alors que je voudrais que tout s'affiche à l'horizontale

https://gyazo.com/a2484fee5446c6d5f0f6daace6e919dc

Bonsoir.
Tu pourrais par exemple commencer par nous montrer le code CSS concerné que tu as déja fait pour que nous puissions t'aider en te disant ce qui ne va pas et t'aider à le corriger.

Je n'y arrive pas avec les grilles tout va à la verticale

Tout simplement parce que tu dois mal les utiliser.

/*
  960 Grid System ~ Core CSS.
  Learn more ~ http://960.gs/

  Licensed under GPL and MIT.
*/

/*
  Forces backgrounds to span full width,
  even if there is horizontal scrolling.
  Increase this if your layout is wider.

  Note: IE6 works fine without this fix.
*/

body {
  min-width: 960px;
}

/* `Container
----------------------------------------------------------------------------------------------------*/

.container_12 {
  margin-left: auto;
  margin-right: auto;
  width: 960px;
}

/* `Grid >> Global
----------------------------------------------------------------------------------------------------*/

.grid_1,
.grid_2,
.grid_3,
.grid_4,
.grid_5,
.grid_6,
.grid_7,
.grid_8,
.grid_9,
.grid_10,
.grid_11,
.grid_12 {
  display: inline;
  float: left;
  margin-left: 10px;
  margin-right: 10px;
}

.push_1, .pull_1,
.push_2, .pull_2,
.push_3, .pull_3,
.push_4, .pull_4,
.push_5, .pull_5,
.push_6, .pull_6,
.push_7, .pull_7,
.push_8, .pull_8,
.push_9, .pull_9,
.push_10, .pull_10,
.push_11, .pull_11 {
  position: relative;
}

/* `Grid >> Children (Alpha ~ First, Omega ~ Last)
----------------------------------------------------------------------------------------------------*/

.alpha {
  margin-left: 0;
}

.omega {
  margin-right: 0;
}

/* `Grid >> 12 Columns
----------------------------------------------------------------------------------------------------*/

.container_12 .grid_1 {
  width: 60px;
}

.container_12 .grid_2 {
  width: 140px;
}

.container_12 .grid_3 {
  width: 220px;
}

.container_12 .grid_4 {
  width: 300px;
}

.container_12 .grid_5 {
  width: 380px;
}

.container_12 .grid_6 {
  width: 460px;
}

.container_12 .grid_7 {
  width: 540px;
}

.container_12 .grid_8 {
  width: 620px;
}

.container_12 .grid_9 {
  width: 700px;
}

.container_12 .grid_10 {
  width: 780px;
}

.container_12 .grid_11 {
  width: 860px;
}

.container_12 .grid_12 {
  width: 940px;
}

/* `Prefix Extra Space >> 12 Columns
----------------------------------------------------------------------------------------------------*/

.container_12 .prefix_1 {
  padding-left: 80px;
}

.container_12 .prefix_2 {
  padding-left: 160px;
}

.container_12 .prefix_3 {
  padding-left: 240px;
}

.container_12 .prefix_4 {
  padding-left: 320px;
}

.container_12 .prefix_5 {
  padding-left: 400px;
}

.container_12 .prefix_6 {
  padding-left: 480px;
}

.container_12 .prefix_7 {
  padding-left: 560px;
}

.container_12 .prefix_8 {
  padding-left: 640px;
}

.container_12 .prefix_9 {
  padding-left: 720px;
}

.container_12 .prefix_10 {
  padding-left: 800px;
}

.container_12 .prefix_11 {
  padding-left: 880px;
}

/* `Suffix Extra Space >> 12 Columns
----------------------------------------------------------------------------------------------------*/

.container_12 .suffix_1 {
  padding-right: 80px;
}

.container_12 .suffix_2 {
  padding-right: 160px;
}

.container_12 .suffix_3 {
  padding-right: 240px;
}

.container_12 .suffix_4 {
  padding-right: 320px;
}

.container_12 .suffix_5 {
  padding-right: 400px;
}

.container_12 .suffix_6 {
  padding-right: 480px;
}

.container_12 .suffix_7 {
  padding-right: 560px;
}

.container_12 .suffix_8 {
  padding-right: 640px;
}

.container_12 .suffix_9 {
  padding-right: 720px;
}

.container_12 .suffix_10 {
  padding-right: 800px;
}

.container_12 .suffix_11 {
  padding-right: 880px;
}

/* `Push Space >> 12 Columns
----------------------------------------------------------------------------------------------------*/

.container_12 .push_1 {
  left: 80px;
}

.container_12 .push_2 {
  left: 160px;
}

.container_12 .push_3 {
  left: 240px;
}

.container_12 .push_4 {
  left: 320px;
}

.container_12 .push_5 {
  left: 400px;
}

.container_12 .push_6 {
  left: 480px;
}

.container_12 .push_7 {
  left: 560px;
}

.container_12 .push_8 {
  left: 640px;
}

.container_12 .push_9 {
  left: 720px;
}

.container_12 .push_10 {
  left: 800px;
}

.container_12 .push_11 {
  left: 880px;
}

/* `Pull Space >> 12 Columns
----------------------------------------------------------------------------------------------------*/

.container_12 .pull_1 {
  left: -80px;
}

.container_12 .pull_2 {
  left: -160px;
}

.container_12 .pull_3 {
  left: -240px;
}

.container_12 .pull_4 {
  left: -320px;
}

.container_12 .pull_5 {
  left: -400px;
}

.container_12 .pull_6 {
  left: -480px;
}

.container_12 .pull_7 {
  left: -560px;
}

.container_12 .pull_8 {
  left: -640px;
}

.container_12 .pull_9 {
  left: -720px;
}

.container_12 .pull_10 {
  left: -800px;
}

.container_12 .pull_11 {
  left: -880px;
}

/* `Clear Floated Elements
----------------------------------------------------------------------------------------------------*/

/* http://sonspring.com/journal/clearing-floats */

.clear {
  clear: both;
  display: block;
  overflow: hidden;
  visibility: hidden;
  width: 0;
  height: 0;
}

/* http://www.yuiblog.com/blog/2010/09/27/clearfix-reloaded-overflowhidden-demystified */

.clearfix:before,
.clearfix:after,
.container_12:before,
.container_12:after {
  content: '.';
  display: block;
  overflow: hidden;
  visibility: hidden;
  font-size: 0;
  line-height: 0;
  width: 0;
  height: 0;
}

.clearfix:after,
.container_12:after {
  clear: both;
}

/*
  The following zoom:1 rule is specifically for IE6 + IE7.
  Move to separate stylesheet if invalid CSS is a problem.
*/

.clearfix,
.container_12 {
  zoom: 1;
}

<!DOCTYPE html>
<html>
<head>
    <title>HighLobby | Boutique</title>
    <link rel="stylesheet" type="text/css" href="css/grille.css">
</head>
<body>
    <center><h1>La boutique de HLobby</h1><hr>
    </center>
    <div class="container_12">
            <div class="grid_3">
                <?php 
                    $req = $bdd->query('SELECT * FROM products ORDER BY id ASC');
                    $result = $req->rowCount();
                    if($result > 0){
                        while ($select = $req->fetch()) {
                ?>
                <center>
                    <h1><?php echo $select['name']; ?></h1>
                    <h3><?php echo $select['description']; ?></h3>
                    <h3><?php echo $select['price']; ?>€</h3>
                </center>
                <?php
                        }
                    }
                 ?>
            </div>
         </div>
    </div>
</body>
</html>

Merci c'est gentil, mais du coup quand j'enlève le container il ne se centre pas au millieu de la page alors que je précise par la suite dans mon fichier grille.css dans le grid_3 un margin-left : auto & un margin-right auto mais cela ne change rien une petite idée? Désolé je suis chiant ^^