/**
* Returns the first image from the post content for a image post
* and the first image from the gallery for a gallery post.
*
* @param $size , $post
*
* @return void
*/
function hannover_image_from_gallery_or_image_post($size, $post)
{
if (has_post_thumbnail()) {
the_post_thumbnail($size);
} else {
$post_format = get_post_format($post);
if ($post_format == 'gallery') {
$images = hannover_get_gallery_images($post->ID);
$image = array_shift($images);
$img_tag = wp_get_attachment_image($image->ID, $size);
} elseif ($post_format == 'image') {
$first_img_url = hannover_get_first_image_from_post_content();
$pattern = '/-\\d+x\\d+(\\.\\w{3,4}$)/i';
$first_img_url = preg_replace($pattern, '${1}', $first_img_url);
$first_img_id = attachment_url_to_postid($first_img_url);
if ($first_img_id == 0) {
$attachments = get_children(array('post_parent' => $post->ID, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order'));
$first_img = array_shift($attachments);
$img_tag = wp_get_attachment_image($first_img->ID, $size);
} else {
$img_tag = wp_get_attachment_image($first_img_id, $size);
}
}
echo $img_tag;
}
}
<?php
/**
* Template Name: Front page with random image
*
* @version 1.0
*/
get_header();
?>
<main role="main">
<?php
$images = hannover_get_gallery_images($post->ID);
shuffle($images);
$first_image = array_shift($images);
?>
<figure>
<?php
if (!empty($first_image)) {
echo wp_get_attachment_image($first_image->ID, 'large');
}
if (!empty($first_image->post_excerpt)) {
?>
<figcaption>
<?php
echo $first_image->post_excerpt;
?>
</figcaption>
<?php
}
?>
</figure>