| has_custom_header() | Check whether a custom header is set or not. |
| is_customize_preview() | Checks whether the site is being previewed in the WordPress Customizer (the visual theme settings page). Conditional tag. |
| has_custom_header() | Check whether a custom header is set or not. |
| is_customize_preview() | Checks whether the site is being previewed in the WordPress Customizer (the visual theme settings page). Conditional tag. |