has_custom_header()
Function: Checks whether a custom header is set or not.
Source: wp-includes/theme.php:1690
has_custom_logo()
Function: Determines whether the site has a custom logo.
Source: wp-includes/general-template.php:993
has_excerpt()
Function: Determines whether the post has a custom excerpt.
Source: wp-includes/post-template.php:441
has_filter()
Function: Checks if any filter has been registered for a hook.
Source: wp-includes/plugin.php:281
has_header_image()
Function: Checks whether a header image is set or not.
Source: wp-includes/theme.php:1153
has_header_video()
Function: Checks whether a header video is set or not.
Source: wp-includes/theme.php:1587
has_image_size()
Function: Check if an image size exists.
Source: wp-includes/media.php:295
has_meta()
Function: Returns meta data for the given post ID.
Source: wp-admin/includes/post.php:1056
has_nav_menu()
Function: Determines whether a registered nav menu location has a menu assigned to it.
Source: wp-includes/nav-menu.php:178
has_post_format()
Function: Check if a post has any of the given formats, or any format.
Source: wp-includes/post-formats.php:49