is_main_site()
Function: Determines whether a site is the main site of the current network.
Source: wp-includes/functions.php:6283
get_main_site_id()
Function: Gets the main site ID.
Source: wp-includes/functions.php:6306
is_main_network()
Function: Determines whether a network is the main network of the Multisite installation.
Source: wp-includes/functions.php:6327
get_main_network_id()
Function: Gets the main network ID.
Source: wp-includes/functions.php:6348
_deprecated_file()
Function: Marks a file as deprecated and inform when it has been used.
Source: wp-includes/functions.php:5629
_deprecated_argument()
Function: Marks a function argument as deprecated and inform when it has been used.
Source: wp-includes/functions.php:5726
_deprecated_hook()
Function: Marks a deprecated action or filter hook as deprecated and throws a notice.
Source: wp-includes/functions.php:5815
_doing_it_wrong()
Function: Marks something as being incorrectly called.
Source: wp-includes/functions.php:5880
is_lighttpd_before_150()
Function: Determines whether the server is running an earlier than 1.5.0 version of lighttpd.
Source: wp-includes/functions.php:6016
apache_mod_loaded()
Function: Determines whether the specified module exist in the Apache config.
Source: wp-includes/functions.php:6034