Gérer des fichiers avec wp_insert_post

<?php

/*
 * Une fonction helper pour gérer l'upload et la création du media attachment
 */

function msk_insert_attachment($file_handler, $id) {
    if ($_FILES[$file_handler]['error'] !== UPLOAD_ERR_OK) __return_false();

    require_once(ABSPATH . "wp-admin" . '/includes/image.php');
    require_once(ABSPATH . "wp-admin" . '/includes/file.php');
    require_once(ABSPATH . "wp-admin" . '/includes/media.php');

    $attach_id = media_handle_upload($file_handler, $id);

    return $attach_id;
}


/*
 * Le traitement des input[type=file] (multiple upload de fichiers possibles)
 * Dans le formulaire il faut : <input type="file" name="fileupload[]" id="fileupload" multiple />
 */

if ($_FILES) {
    $files = $_FILES['fileupload'];

    foreach ($files['name'] as $key => $value) {
        if ($files['name'][$key]) {
            $file = array(
                'name'     => $files['name'][$key],
                'type'     => $files['type'][$key],
                'tmp_name' => $files['tmp_name'][$key],
                'error'    => $files['error'][$key],
                'size'     => $files['size'][$key]
            );

            $_FILES = array('upload_attachment' => $file);

            foreach ($_FILES as $file => $array) {
                $new_upload = msk_insert_attachment($file, $product_name_draft_id);
                $new_array = get_post_meta($product_name_draft_id, '_images_image', true);
                $new_array[] = $new_upload;
                update_post_meta($product_name_draft_id, '_images_image', $new_array);
            }
        }
    }
}

?>