Using WordPress ‘header_textcolor()’ PHP function
Displays the custom header text color in 3- or 6-digit hexadecimal form (minus the hash symbol).
PHP
Using WordPress ‘has_term()’ PHP function
Checks if the current post has any of given terms.
Using WordPress ‘has_post_parent()’ PHP function
This article explains how to use the WordPress `has_post_parent()` function, which checks whether a post has a parent post
Using WordPress ‘has_header_video()’ PHP function
The `has_header_video()` function in WordPress checks if a header video is set and returns true if one exists, false otherwise