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<?php

/**
 * These functions can be replaced via plugins. If plugins do not redefine these
 * functions, then these will be used instead.
 *
 * @package WordPress
 */

if ( ! function_exists( 'wp_set_current_user' ) ) :
/* function wp_set_current_user() – Changes the current user by ID or name. */
endif;

if ( ! function_exists( 'wp_get_current_user' ) ) :
/* function wp_get_current_user() – Retrieve the current user object. */
endif;

if ( ! function_exists( 'get_userdata' ) ) :
/* function get_userdata() – Retrieve user info by user ID. */
endif;

if ( ! function_exists( 'get_user_by' ) ) :
/* function get_user_by() – Retrieve user info by a given field */
endif;

if ( ! function_exists( 'cache_users' ) ) :
/* function cache_users() – Retrieve info for user lists to prevent multiple queries by get_userdata() */
endif;

if ( ! function_exists( 'wp_mail' ) ) :
/* function wp_mail() – Sends an email, similar to PHP’s mail function. */
endif;

if ( ! function_exists( 'wp_authenticate' ) ) :
/* function wp_authenticate() – Authenticate a user, confirming the login credentials are valid. */
endif;

if ( ! function_exists( 'wp_logout' ) ) :
/* function wp_logout() – Log the current user out. */
endif;

if ( ! function_exists( 'wp_validate_auth_cookie' ) ) :
/* function wp_validate_auth_cookie() – Validates authentication cookie. */
endif;

if ( ! function_exists( 'wp_generate_auth_cookie' ) ) :
/* function wp_generate_auth_cookie() – Generates authentication cookie contents. */
endif;

if ( ! function_exists( 'wp_parse_auth_cookie' ) ) :
/* function wp_parse_auth_cookie() – Parses a cookie into its components. */
endif;

if ( ! function_exists( 'wp_set_auth_cookie' ) ) :
/* function wp_set_auth_cookie() – Sets the authentication cookies based on user ID. */
endif;

if ( ! function_exists( 'wp_clear_auth_cookie' ) ) :
/* function wp_clear_auth_cookie() – Removes all of the cookies associated with authentication. */
endif;

if ( ! function_exists( 'is_user_logged_in' ) ) :
/* function is_user_logged_in() – Determines whether the current visitor is a logged in user. */
endif;

if ( ! function_exists( 'auth_redirect' ) ) :
/* function auth_redirect() – Checks if a user is logged in, if not it redirects them to the login page. */
endif;

if ( ! function_exists( 'check_admin_referer' ) ) :
/* function check_admin_referer() – Ensures intent by verifying that a user was referred from another admin page with the correct security nonce. */
endif;

if ( ! function_exists( 'check_ajax_referer' ) ) :
/* function check_ajax_referer() – Verifies the Ajax request to prevent processing requests external of the blog. */
endif;

if ( ! function_exists( 'wp_redirect' ) ) :
/* function wp_redirect() – Redirects to another page. */
endif;

if ( ! function_exists( 'wp_sanitize_redirect' ) ) :
/* function wp_sanitize_redirect() – Sanitizes a URL for use in a redirect. */

/* function _wp_sanitize_utf8_in_redirect() – URL encode UTF-8 characters in a URL. */
endif;

if ( ! function_exists( 'wp_safe_redirect' ) ) :
/* function wp_safe_redirect() – Performs a safe (local) redirect, using wp_redirect(). */
endif;

if ( ! function_exists( 'wp_validate_redirect' ) ) :
/* function wp_validate_redirect() – Validates a URL for use in a redirect. */
endif;

if ( ! function_exists( 'wp_notify_postauthor' ) ) :
/* function wp_notify_postauthor() – Notify an author (and/or others) of a comment/trackback/pingback on a post. */
endif;

if ( ! function_exists( 'wp_notify_moderator' ) ) :

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