Use echo for functions that return values (e.g., esc_url(get_permalink())).

Don’t use echo for functions that output directly (e.g., the_permalink()).

Always escape output (e.g., esc_url(), esc_html()) to prevent XSS attacks.

Prefer return functions (e.g., get_permalink()) over output functions (e.g., the_permalink()) for better control.

Correct Example:

<a href="<?php echo esc_url(get_permalink()); ?>">link</a>

This ensures security and proper functionality. Thanks