Optimize and unify PHP

We should check the PHP code for places to optimize and/or unify it, to make it more consistent.

For example, you can generally replace lines like these:

echo apply_filters('the_content', $post->post_content);

with this

the_content();

Generally, you should add a the_post(); call when using the_ functions. If you don't, most stuff still works, but some mysteriously breaks.

Files to rework

Checked files have already been optimized and unified

• header.php
• index.php
• landing.php
• 404.php
• footer.php
• functions.php
• page.php
• single.php