display recent post in sidebar with post thumbnail in wordpress - php

Question

I am trying to display recent post with thumbnail,title and author name on by website's blog details page's sidebar . title and author is proper but somehow thumbnail image is not showing proper and also when I check in view source, it's not taking thumbnail size 150*150, it's taking image's original size.
check url:- https://stageserver.co/officework/dev/6-lead-generation-techniques-to-immediately-turn-your-business-into-a-sales-magnet-9-3/
This is the code that I tried:-
<!-- Latest News -->
<?php $orig_post = $post;
global $post;
$tags = wp_get_post_tags($post->ID);
if ($tags) {
$tag_ids = array();
foreach($tags as $individual_tag) $tag_ids[] = $individual_tag->term_id;
$args=array(
'tag__in' => $tag_ids,
'post__not_in' => array($post->ID),
'posts_per_page'=>5, // Number of related posts that will be shown.
'caller_get_posts'=>1
);
$my_query = new wp_query( $args );
if( $my_query->have_posts() ) {
echo '<div class="sidebar-widget latest-news"><div class="sidebar-title">
<h2>Recent Post</h2>
</div>';
while( $my_query->have_posts() ) {
$my_query->the_post(); ?>
<div class="widget-content">
<article class="post">
<div class="post-thumb">
<a href="<?php the_permalink(); ?>" ><img src="<?php
the_post_thumbnail(); ?>" ></img></a>
</div>
<h3><?php the_title(); ?></h3>
<div class="post-info"><?php the_author(); ?></div>
</article>
</div>
<? }
echo '</div>';
}
}
$post = $orig_post;
wp_reset_query(); ?>
thanks in advance pls help as soon as possible I am new in php

Answer 1

You can pass the size and other attribute to the the_post_thumbnail( $size, $attr ); function, Default value: 'post-thumbnail'.
Try:
the_post_thumbnail('thumbnail');
the_post_thumbnail('thumbnail'); // Thumbnail (default 150px x 150px max)
the_post_thumbnail('medium'); // Medium resolution (default 300px x 300px max)
the_post_thumbnail('medium_large'); // Medium Large resolution (default 768px x 0px max)
the_post_thumbnail('large'); // Large resolution (default 1024px x 1024px max)
the_post_thumbnail('full'); // Original image resolution (unmodified)
the_post_thumbnail( array(100,100) ); // Other resolutions
Ok so also the_post_thumbnail() return the image not just the url, so try:
<div class="post-thumb">
<a href="<?php the_permalink(); ?>">
<?php the_post_thumbnail('thumbnail'); ?>" >
</a>
</div>