Fetching all images of a posts in wordpress - php

Question

I need to fetch the featured images of posts in WordPress Currently, I am having the code for listing posts with images and text.
I am having a posts page that lists all posts I need to list the photos of the posts to another page
<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
<?php if ( has_post_thumbnail() ) : ?>
<div class="entry-thumb">
<?php the_post_thumbnail( 'oblique-entry-thumb'); ?>
<a class="thumb-link" href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><i class="fa fa-link"></i></a>
</div>
<?php else : ?>
<div class="entry-thumb">
<img src="http://placehold.it/500x500" />
<a class="thumb-link" href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><i class="fa fa-link"></i></a>
</div>
<?php endif; ?>
<?php //if ( has_post_thumbnail() ) : ?>
<div class="post-inner post-inner-height">
<?php //else : ?>
<!-- <div class="post-inner no-thumb"> -->
<?php //endif; ?>
<header class="entry-header">
<?php the_title( sprintf( '<h1 class="entry-title entry-title-height">', esc_url( get_permalink() ) ), '</h1>' ); ?>
<?php if ( 'post'==g et_post_type() && !get_theme_mod( 'meta_index') ) : ?>
<!-- .entry-meta -->
<?php endif; ?>
</header>
<!-- .entry-header -->
<div class="entry-content entry-con-fixh">
<?php the_excerpt(); ?>
<?php wp_link_pages( array( 'before'=>'
<div class="page-links">' . __( 'Pages:', 'oblique' ), 'after' => '</div>', ) ); ?>
</div>
<!-- .entry-content -->
</div>
<?php if (!get_theme_mod( 'read_more')) : ?>
<div class="read-more">
<a href="<?php the_permalink(); ?>">
<?php echo __( 'Continue reading …', 'oblique'); ?>
</a>
</div>
<?php endif; ?>
</article>
<!-- #post-## -->
This is the code I am having. If I am having 50 posts how can I able to filter the images from that post
I tried using the following code
<?php if ( has_post_thumbnail() ) : ?>
<div class="entry-thumb">
<?php the_post_thumbnail( 'oblique-entry-thumb'); ?>
<a class="thumb-link" href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><i class="fa fa-link"></i></a>
</div>
<?php else : ?>
<div class="entry-thumb">
<img src="http://placehold.it/500x500" />
<a class="thumb-link" href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><i class="fa fa-link"></i></a>
</div>
<?php endif; ?>
but it wont display all images it shows only the dummy image that I placed

Answer 1

If you want all post then you need to iterate over them and fetch the post thumbnail.
<?php
// define query fields
$query = array(
// define post type to query
'post_type' => 'post',
// define posts count as -1, to fetch all
'posts_per_page' => -1
);
// query the post
$posts = query_posts($query);
// iterate over the posts
foreach ($posts as $post): ?>
<!-- echo the thumbnail -->
<?php echo get_the_post_thumbnail($post->ID); ?>
<!-- rest of the HTML -->
<?php endforeach; ?>