Adding Custom Functions in Themes — a practical guide to WordPress theme custom functions with clear examples you can reuse in real projects.
WordPress Theme Development Series (46/96). Prefer one article? Read the complete WordPress theme development tutorial.
Short description
Prefix everything, avoid polluting the global namespace, and move helpers into `/inc` files.
Prefixed helper
function acme_posted_on() {
echo '<time datetime="' . esc_attr(get_the_date(DATE_W3C)) . '">' . esc_html(get_the_date()) . '</time>';
}