php code to shortcode [duplicate]

by

Hi You can use this code.

function wpse_143641_profile_shortcode( $atts ) 
  {
   echo get_avatar( get_current_user_id(), 64 );
  }
add_shortcode( 'royal_profile', 'wpse_143641_profile_shortcode' );

And you should add the short code in your editor 

[royal_profile]

or template 

do_shortcode('[royal_profile]')