获取Wordpress帖子的主映像

Posted 2021-02-25

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

<?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');
 
?>