estrarre immagini

<?php

function image_random(){
	global $wpdb;
	$_query = $wpdb->get_results("SELECT ID FROM $wpdb->posts AS posts
		WHERE posts.post_type = 'attachment'
		AND posts.post_mime_type IN ('image/jpeg','image/gif','image/jpg','image/png')",ARRAY_N);
	$random = array_rand($_query);
        //ritorniamo l'id dell'immagine
	return $_query[$random][0];
}
//richiamiamo la funzione

function gallery_z_psthumbnails() {

	$image_ID = image_random();



//////
$newline = "\n"; ?>


<div class="bg_image"></div>
		<div id="loader" class="loader"></div>
		<div class="wrapper">
	<div id="ps_container" class="ps_container">
				<div class="ps_image_wrapper"></div>

				<div class="ps_next"></div>
				<div class="ps_prev"></div>

				<ul class="ps_nav">



		<li><a href="<?php echo wp_get_attachment_url($image_ID,'full'); ?>" rel="<?php echo wp_get_attachment_url($image_ID,'thumbnail'); ?>"></a></li>






<li class="ps_preview">
						<div class="ps_preview_wrapper">

						</div>

						<span></span>
					</li>
				</ul>
			</div>
		</div>

	<?php

}
?>




<?php

add_shortcode('zpsthumbnails', 'gallery_z_psthumbnails');

?>