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How To Add Post and Page Thumbnail (Featured Images) Support

Snippets by IsItWP

Are you looking for a way to add post and page thumbnail (featured images) support to a theme? This snippet will let you add featured images to posts and pages.

Instructions:

  1. Add this code to your theme’s functions.php file or in a site-specific plugin:
    add_theme_support( 'post-thumbnails' );
    

    If you want to add featured images to pages or posts only, add one of the following snippets instead:

    • This snippet adds support for pages only:
      // This adds support for pages only:
      add_theme_support( 'post-thumbnails', array( 'page' ) );
      
    • This snippet adds support for posts only:
      // And this adds support for posts only:
      add_theme_support( 'post-thumbnails', array( 'post' ) );
      
  2. Then, add this snippet inside The Loop.

    // To get the thumbnail in your post, you add the following inside the loop:
    if ( has_post_thumbnail() ) {
    	set_post_thumbnail_size( 400, 150 ); # width, height #
    	the_post_thumbnail();
    }
    

Note: If this is your first time adding code snippets in WordPress, then please refer to our guide on how to properly copy / paste code snippets in WordPress, so you don’t accidentally break your site.

If you liked this code snippet, please consider checking out our other articles on the site like: 19 Best WordPress Plugins for Photographers.

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