Wordpress Theme: Featured Image / Post Thumbnail

wordpress_featured_image.php

<?php

/**
 * Featured Image Support for Wodpress Theme
 * @author Ali Haris (@iharis) (http://gist.github.com/harisdozz)
 * @since 1349163394
 */

/**
 * Add the following to theme functions.php to enable the core-function
 * Enables Featured Image for both Posts and Pages
 */
add_theme_support('post-thumbnails');

/**
 * To enable featured image only to posts 
 */
add_theme_support('post-thumbnails', array('post')); 

/**
 * To enable featured image only to pages
 */
add_theme_support('post-thumbnails', array('page'));

/**
 * To resize the thumbnail to 50x50 px, box resize mode
 */
set_post_thumbnail_size(50, 50);

/**
 * To resize the thubnail to 50x50 px, hard crop mode
 */
set_post_thumbnail_size(50,50, true);

/**
 * To check if the post has thumbnail
 */
if ( has_post_thumbnail() ) {
	// the current post has a thumbnail
} else {
	// the current post lacks a thumbnail
}

/**
 * To display the thumbnail
 */
the_post_thumbnail();