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limiter une boucle à un site


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Hello j'aurais besoin urgemment de votre aide svp... Cela fais des jours que je bloques.
Voilà j'ai des posts , chaque posts a plusieurs categories.

j'ai fais une requete wp_query pour lister tous les posts sauf une categorie ,mais je me retrouves avec des doublons . voila mon code 

<?php
/**
 * The template for displaying a grid item.
 *
 * @package WordPress
 * @subpackage Edition
 * @since Edition 1.0
 */


$do_not_duplicate = array(); 
$query = new WP_Query( array( 'category__not_in' => array( 32 ) ) );

 if ( $query->have_posts() ) : while ( $query->have_posts() ) : $query->the_post();
 $do_not_duplicate[] = $post->ID; 

global
$tw_section, // section object
$grid_size, // grid size
$post;       // section object

$section_id    = get_the_ID($post);  // section id
$tw_categories = get_categories();   // get all post categories
$post_type     = get_post_type();


$thumbnail_size = 'half';
$thumbnail_size = ($grid_size == 'fullgrid') ? 'big' : $thumbnail_size;
if ($grid_size == 'related') {
    $thumbnail_size = 'related';
} ?>

<div class="<?php if ( isset($tw_categories[0]->term_id) ) { echo 'highlight_category_' . $tw_categories[0]->term_id; } ?> <?php echo (has_post_thumbnail()) ? 'has-thumbnail' : 'no-thumbnail'; ?> <?php echo $grid_size;?> grid-item">
    <div class="isobrick-inner">
        <?php
            the_post_thumbnail($thumbnail_size, array(
                'onload' => 'jQuery(this).animate({ "opacity" : 0.75 }, 500);'
            ));
        ?>

        <?php echo themewich_review_circle('none', false); ?>

        <?php if ( 'post' == $post_type ) : ?>
            <span class="thumboverdate">
                <i class="fa fa-bookmark"></i>
                <?php themewich_date('human'); ?>
            </span>
        <?php else: ?>
            <?php if ( function_exists( 'wc_get_template' ) ) : ?>
                <span class="thumboverdate">
                    <?php wc_get_template( 'loop/price.php' ); ?>
                </span>
            <?php endif; ?>
        <?php endif; ?>

        <div class="thumbovertext">
            <div class="badge">
                <?php echo ag_get_cats(3); ?>
            </div>
            <h2 class="title">
                <a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>">
                    <?php
                        $title = get_the_title();
                        if (strlen($title) >= 75) {
                             $title = mb_substr($title, 0, 75) . "... ";
                        }
                        echo $title;
                    ?>
                </a>
            </h2>

            <?php if ( 'post' == $post_type ) : ?>
                <?php preg_match('/<!--more(.*?)?-->/', $post->post_content, $matches); ?>
                <a class="button outline" href="<?php the_permalink(); ?>"  title="<?php the_title_attribute(); ?>">
                    
                    <?php
                        if ( isset($matches[1]) && $matches[1] ) {
                            echo $matches[1];
                        } else {
                            _e('Lire la suite', 'themewich');
                        }
                    ?>
                </a>
            <?php endif; ?>

        </div>

        <a class="brick-thumb-link" href="<?php the_permalink(); ?>"  title="<?php the_title_attribute(); ?>">
            <?php the_title(); ?>
        </a>
    </div>
</div>



<?php endwhile; ?>
<?php endif; ?>
<?php wp_reset_query(); ?>

 

 

 

et quand je fais un var_dump ($do_not_duplicate);

j'obtiens 

array(1) { [0]=> int(470) }

array(2) { [0]=> int(470) [1]=> int(368) } 

array(3) { [0]=> int(470) [1]=> int(368) [2]=> 

 

 

et je souhaiterai avec l'aide d'un foreach ne poster mon article qu'une fois

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