To register a sidebar for the widget area in WordPress, use this code.
Rating: 0  
  Views: 1   

Get the post featured image url with this code.
Rating: 0  
  Views: 1   

Most themes already come with this support but if you are building one from scratch and you want to add this ability, just add this add_theme_support code to the functions.php file.
Rating: 0  
  Views: 1   

To add WooCommerce support in a WordPress theme, you just need to add this line of code in the functions.php file and then install WooCommerce plugin. This will add all kinds of WooCommerce functionality to the theme.
Rating: 0  
  Views: 2   

To create a new child theme, all you need to do is create a new directory inside the wp-content/themes/ directory and create a new styles.css file with this code inside it.
Rating: 0  
  Views: 2