另一种选择是查看挂钩map_meta_cap 并删除用户的以下功能：delete_site. 如果您想要允许delete_site 然后您可以允许该功能。

你说得对，editing core is a no-no.

相反，您可以这样做。

add_action( \'current_screen\', \'wpse242553_no_delete_site_screen\' );
function wpse242553_no_delete_site_screen() {
    // Check to see if we\'re using the CLI client. If so, bail out.
    if ( \'cli\' == php_sapi_name() ) {
        return;
        // I\'m not sure this is strictly necessary.
    }
    if ( \'ms-delete-site\' == get_current_screen()->base ) {
        // You can add whatever message you like here,
        // or even use wp_safe_redirect() to go elsewhere.
        wp_die( \'Sorry, we only delete sites from the command line.\' );
    }

}

参考文献current_screen hook

get_current_screen()

php_sapi_name() （我查过了，如果你使用wp-cli, 它返回cli 作为SAPI名称）