if ( !is_multisite() ) { wp_redirect( site_url( '/wp-login.php?action=register' ) );//将用户重定向到一个预先制定的绝对URI
die(); }
$wp_query->is_404 = false; //$wp_query 是在wp-blog-header.php文件中定义的一个WP_Query实体对象,它提供了当前请求的信息。->这个符号访问类实例的属性、方法;
// is_multisite()函数源码,是wordpress自己定义的一个函数
function is_multisite() {
if ( defined( 'MULTISITE' ) )
return MULTISITE;
if ( defined( 'SUBDOMAIN_INSTALL' ) || defined( 'VHOST' ) || defined( 'SUNRISE' ) )
return true;
return false;
}
//函数源码:
function wp_redirect($location, $status = 302) {
global $is_IIS;
/**
* Filter the redirect location.
*
* @since 2.1.0
*
* @param string $location The path to redirect to.
* @param int $status Status code to use.
*/
$location = apply_filters( 'wp_redirect', $location, $status );
/**
* Filter the redirect status code.
*
* @since 2.3.0
*
* @param int $status Status code to use.
* @param string $location The path to redirect to.
*/
$status = apply_filters( 'wp_redirect_status', $status, $location );
if ( ! $location )
return false;
$location = wp_sanitize_redirect($location);
if ( !$is_IIS && php_sapi_name() != 'cgi-fcgi' )
status_header($status); // This causes problems on IIS and some FastCGI setups
header("Location: $location", true, $status);
return true;
}