How to get specific featured images of the post in wordpress. ? - php

Question

In the code below I am trying to extract the exactly featured image of the post_id = 25 but instead, it is pulling new images of the different post.
<?php
$post_ID= 25;
$post_url= get_permalink($post_ID);
$queried_post = get_post($post_ID);
?>
<img class="img-circle" src="<?php
if (has_post_thumbnail($post_ID)) {
the_post_thumbnail('medium');
}
?>"
<h2><a href="<?php get_permalink($post_url) ?>"</a><?php echo $queried_post->post_title; ?></h2>
<p><?php
query_posts('p=25');
if (have_posts()) : while (have_posts()) : the_post();
?>
<div class="entry">
<?php echo substr(get_the_excerpt(), 0, 300); ?><span>[...]</span>
</div>
<?php
endwhile;
endif;
?>
<p><a class="btn btn-default" href="#" role="button" >View details »</a></p>

Answer 1

You'll need to use get_the_post_thumbnail in order to pass in the id.
if (has_post_thumbnail($post_ID)) {
echo get_the_post_thumbnail($post_ID,'medium');
}
the_post_thumbnail actually does this:
function the_post_thumbnail( $size = 'post-thumbnail', $attr = '' ) {
echo get_the_post_thumbnail( null, $size, $attr );
}
get_the_post_thumbnail in turn uses the current post id if null is passed in.
EDIT
You just need to change this:
<?php
$post_ID= 25;
$post_url= get_permalink($post_ID);
$queried_post = get_post($post_ID);
?>
<img class="img-circle" src="<?php
if (has_post_thumbnail($post_ID)) {
the_post_thumbnail('medium');
}
?>"
To this:
<?php
$post_ID= 25;
$post_url= get_permalink($post_ID);
$queried_post = get_post($post_ID);
?>
<img class="img-circle" src="<?php
if (has_post_thumbnail($post_ID)) {
echo get_the_post_thumbnail($post_ID,'medium');
}
?>"