Login

function v_forcelogin() {

// Exceptions for AJAX, Cron, or WP-CLI requests
if ( ( defined( ‚DOING_AJAX‘ ) && DOING_AJAX ) || ( defined( ‚DOING_CRON‘ ) && DOING_CRON ) || ( defined( ‚WP_CLI‘ ) && WP_CLI ) ) {
return;
}

// Redirect unauthorized visitors
if ( !is_user_logged_in() ) {
// Get URL
$url = isset( $_SERVER[‚HTTPS‘] ) && ‚on‘ === $_SERVER[‚HTTPS‘] ? ‚https‘ : ‚http‘;
$url .= ‚://‘ . $_SERVER[‚HTTP_HOST‘];
// port is prepopulated here sometimes
if ( strpos( $_SERVER[‚HTTP_HOST‘], ‚:‘ ) === FALSE ) {
$url .= in_array( $_SERVER[‚SERVER_PORT‘], array(’80‘, ‚443‘) ) ? “ : ‚:‘ . $_SERVER[‚SERVER_PORT‘];
}
$url .= $_SERVER[‚REQUEST_URI‘];

// Apply filters
$bypass = apply_filters ( ‚v_forcelogin_bypass‘, false );
$whitelist = apply_filters( ‚v_forcelogin_whitelist‘, array() );
$redirect_url = apply_filters( ‚v_forcelogin_redirect‘, $url );

// Redirect visitors
if ( preg_replace(‚/\?.*/‘, “, $url) != preg_replace(‚/\?.*/‘, “, wp_login_url()) && !in_array($url, $whitelist) && !$bypass ) {
wp_safe_redirect( wp_login_url( $redirect_url ), 302 ); exit();
}
}
else {
// Only allow Multisite users access to their assigned sites
if ( function_exists(‚is_multisite‘) && is_multisite() ) {
$current_user = wp_get_current_user();
if ( !is_user_member_of_blog( $current_user->ID ) && !is_super_admin() )
wp_die( __( „You’re not authorized to access this site.“, ‚wp-force-login‘ ), get_option(‚blogname‘) . ‚ › ‚ . __( „Error“, ‚wp-force-login‘ ) );
}
}
}
add_action(‚template_redirect‘, ‚v_forcelogin‘);