how to get post thumbnail using post id in wordpress?

5 comments

1. Try this

   global $post;
   $thumb = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), 'post'); 
   echo $thumb[0];
   

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2. In your case you make a small mistake that you put the single quote inside the function when function require an integer value.

    echo get_the_post_thumbnail('637');  

   Bellow code are valid try it.

   Simple Form

    echo get_the_post_thumbnail(637);  

   Size Specified Form where second argument is the size of the image.

    echo get_the_post_thumbnail(637, array(100,100));  

   also you can try bellow code also

   get_the_post_thumbnail(637);                  // without parameter -> Thumbnail
   get_the_post_thumbnail(637, 'thumbnail');     // Thumbnail
   get_the_post_thumbnail(637, 'medium');        // Medium resolution
   get_the_post_thumbnail(637, 'large');         // Large resolution
   get_the_post_thumbnail(637, 'full');          // Original resolution
   

   Also you can refer to the WordPress codex Here.
   I am also going to write a full post on this topic on my blog

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3. Use Require_once Or include_once

   require_once('/the/path/to/your/wp-blog-header.php');
   
   include_once('wp-blog-header.php' );
   
   
   
   
   
   get_the_post_thumbnail($post_id);           // without parameter -> Thumbnail
   
   
   get_the_post_thumbnail($post_id, 'thumbnail');     // Thumbnail
   get_the_post_thumbnail($post_id, 'medium');        // Medium resolution
   get_the_post_thumbnail($post_id, 'large');         // Large resolution
   get_the_post_thumbnail($post_id, 'full');          // Original resolution
   
   get_the_post_thumbnail($post_id, array(100,100) ); // Other resolutions
   

   Out side of loop
   

   global $post;
   
   
   if (has_post_thumbnail( $post->ID ) ){
   //    
         get_the_post_thumbnail($post->ID); 
   //
   
   }
   

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4. Vallabh’s solution works. This is how I use it as a background image:

   <?php if (has_post_thumbnail( $post->ID ) ) {
       $image = wp_get_attachment_image_src( get_post_thumbnail_id(637), 'thumbnail' );
       $image = $image[0];
   } ?>
   
   <div style="background-image: url(<?php echo $image; ?>)"> ... </div>
   

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5. Create a post template..look like this(post_temp.php)

    <?php
   
      $args=array('order'=> 'DESC', 'posts_per_page'=>get_option('posts_per_page'));
   
      $query=new WP_Query($args);
   
      if( $query->have_posts()): 
   
      while( $query->have_posts()): $query->the_post();
   
      {
        echo get_the_post_thumbnail($post->ID); 
      }
   
      endwhile; 
      else:
      endif;
   
    ?>
   

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