duogeekdev

<?php

function add_featured_image_in_rss() {

    if ( function_exists( 'get_the_image' ) && ( $featured_image = get_the_image('format=array&echo=0') ) ) {
        $featured_image[0] = $featured_image['url'];
    } elseif ( function_exists( 'has_post_thumbnail' ) and has_post_thumbnail() ) {
        $featured_image = wp_get_attachment_image_src( get_post_thumbnail_id(), 'post-thumbnail' );
    } elseif ( function_exists( 'get_post_thumbnail_src' ) ) {
        $featured_image = get_post_thumbnail_src();

duogeekdev

<?php

// Simple way
add_filter( 'show_admin_bar', '__return_false' );

// Standard way
add_filter( 'show_admin_bar', 'show_admin_bar_cb' );
function show_admin_bar_cb() {
  return false;
}

duogeekdev

<?php

function do_something() {
  // Here we are doing something
}

function do_another_thing() {
  $some_variable = do_something();
  // Here we are doing another thing
}