Wordpress Search Results for Multiple Post Types

The wp_get_attachment_image_src() function expects you to also pass some kind of attachment ID plus it doesn’t grab the image HTML that we need so instead we should use wp_get_attachment_image().

IF a post has a post thumbnail, grab it.
ELSE IF the post has any attached images, grab the first one.
ELSE maybe show a placeholder? I’ve defined the else case at the top of the loop as a default.

if( have_posts() ) {
    while( have_posts() ) {
        the_post();
        $image_html=""; // assign placeholder url here?

        if( has_post_thumbnail() ) {
            $image_html = get_the_post_thumbnail( $post->ID, 'custom-size', array( 'class' => 'img-style' ) );
        } else { // We don't have a thumbnail - grab attachments
            $media = get_posts( array(
                'post_type'         => 'attachment',
                'posts_per_page'    => 1,
                'post_status'       => 'any',
                'post_parent'       => $post->ID
                'post_mime_type'    => array( 'image/jpeg', 'image/gif', 'image/png', 'image/bmp', 'image/tiff', 'image/x-icon' );
            ) );

            if( ! empty( $media ) ) {
                $image_html = wp_get_attachment_image( $media[0]->ID, 'cusotm-size', false, array( 'class' => 'img-style' ) );
            }
        }

        if( ! empty( $image_html ) ) {
            echo '<a href="'. get_permalink() . '">' . $image_html . '</a>';
        }
    }
}

Note, I haven’t tested the above so feel free to refine it.

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