Grab first image from post if no featured image

[amandathewebdev]

Hi all,

I recently migrated a whole bunch of old blog posts to a new site and apparently WP Importer doesn't grab images. Anywho the problem is it would be way too time consuming to go through all 100+ posts and set a featured image. Is there a way to grab whatever the first image is and display it as a featured image?

This code worked before I imported the posts, but no longer does:

/*look for featured image, if not, grab post image*/
function get_image() {
  if ( has_post_thumbnail() ) {
	$src = wp_get_attachment_image_src( get_post_thumbnail_id(), 'thumb' );
	$fbimage = $src[0];
  } else {
	global $post, $posts;
	$fbimage = '';
	$output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i',
	$post->post_content, $matches);
	$fbimage = $matches [1] [0];
  }
  if(empty($fbimage)) {
    $fbimage = site_url().'/wp-content/themes/child/images/logo_transparent.png';
  }
  return $fbimage;
}

http://dentaluxpa.com/blog/

[carrieoke13]

This is the code I used and it used to work with Minimum Pro - it's pretty similar to yours:

//*get first image

function catch_that_image() {
  global $post, $posts;
  $first_img = '';
  ob_start();
  ob_end_clean();
  $output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches);
  $first_img = $matches[1][0];

  if(empty($first_img)) {
    $first_img = "/path/to/default.png";
  }
  return $first_img;
}

This tutorial also looks promising: http://www.wpbeginner.com/wp-themes/how-to-set-a-default-fallback-image-for-wordpress-post-thumbnails/

[amandathewebdev]

Thanks for the reply carrieoke13. That code threw an error for me though.

My code is working but not on the posts I migrated. I think the issue might be that the images were not uploaded into THIS particular WP install. Even though the folders exist under wp-content > uploads with the images inside, they are not a part of the media library. The images I upload to the media library pull correctly if no featured image.

Why is that the case? Very weird. So maybe I should treat these images as external linked images? How would I pull those?

[carrieoke13]

hmm. have you tried a plugin like Regenerate Thumbnails to see if it would fix the issue?

[amandathewebdev]

Thanks for the suggestion. Unfortunately it didn't work.

[amandathewebdev]

If I add add_action( 'genesis_get_image', 'get_image', 3 ); then I see the img URL text next to every blog post. Not an image, but it's something.

[amandathewebdev]

OK I figured it out with (a lot of) help from a co-worker. If anyone stumbles across this, this is what I did, all in my functions.php:

function get_src() {
  if ( has_post_thumbnail() ) {
	$src = wp_get_attachment_image_src( get_post_thumbnail_id(), 'thumb' );
	$fbimage = $src[0];
  } else {
	global $post, $posts;
	$fbimage = '';
	$output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i',
	$post->post_content, $matches);
	$fbimage = $matches [1] [0];
  }
  if(empty($fbimage)) {
    $fbimage = site_url().'/wp-content/themes/epik/img/logo.png';
  }
  return $fbimage;
}
add_filter('genesis_get_image', 'default_image_fallback', 10, 2);
function default_image_fallback($output, $args) {
    return get_image();
}

function get_image($class="") {
    $src = get_src();
    ob_start()?>
    <a href="<?php echo get_permalink() ?>">
        <img class="featured-image <?php echo $class ?>" src="<?php echo $src ?>" alt="<?php echo get_the_title() ?>" />
    </a>
    <?php return ob_get_clean();
}

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