<?php

//Put this in functions.php

function get_primary_image($id, $size){
	$featured = wp_get_attachment_image_src( get_post_thumbnail_id($id), $size, false);
	if($featured){
		$childURL = $featured['0'];
	}else{
		$children = get_children(array('post_parent' => $id, 'post_type' => 'attachment', 'post_mime_type' => 'image', 'numberposts' => 1));
		reset($children);
		$childID = key($children);
		//$childURL = wp_get_attachment_url($childID);
		$childArray = wp_get_attachment_image_src($childID, $size, false);
		$childURL = $childArray['0'];
		if(empty($childURL)){
			$childURL = get_bloginfo('template_url')."/images/default.png";
		}
	}
	return($childURL);
}


//Run this in the loop (or any place you'd like - as long as you have an ID to feed it..)
//First argument is the ID..
//Second argument is the size.. It'll handle 'large', 'medium', 'thumbnail' or even 

'array(100, 100)'..
get_primary_image(get_the_ID(), 'large');

?>

<?php

//Put this in functions.php

function get_primary_image($id, $size){
	$featured = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), $size, false);
	if($featured){
		$childURL = $featured['0'];
	}else{
		$children = get_children(array('post_parent' => $id, 'post_type' => 'attachment', 'post_mime_type' => 'image', 'numberposts' => 1));
		reset($children);
		$childID = key($children);
		//$childURL = wp_get_attachment_url($childID);
		$childArray = wp_get_attachment_image_src($childID, $size, false);
		$childURL = $childArray['0'];
		if(empty($childURL)){
			$childURL = get_bloginfo('template_url')."/images/default.png";
		}
	}
	return($childURL);
}


//Run this in the loop (or any place you'd like - as long as you have an ID to feed it..)
//First argument is the ID..
//Second argument is the size.. It'll handle 'large', 'medium', 'thumbnail' or even 

'array(100, 100)'..
get_primary_image(get_the_ID(), 'large');

?>

If post has featured image, use it.. If not, pick out the first in the post.. Still not working? Stick with the default one..

Get primary image for Wordpress post

image, wordpress

PHP