It may be happening on various levels. Process in this order: Deactivate all plugins which may make this redirection. .htaccess file. Look into that file and search for redirection rules with client domain. Different plugins could enter here own rules and they will be active even after plugin deactivation. Check database for containing old domain. Especially table and rows wp_options.siteurl and wp_options.home . Search and replace if they contain wrong domain. If problem is still here, look for javascript redirection in theme files.

Each design pattern solves particular common problem. For me, there is no point in asking "which one is the most usefull" :) As always, @jeffreyway do best to make it understandable (jargon reduced to a minimum) in his Design Patterns in PHP series. Recommend it.

There is an error in demo. You can't declare Modules object that way. Use self-invoked anonymous function and try to pass languageobj as param of anonymous function. https://jsbin.com/robakakoja/1/edit?js,console (function(lang) { var Modules = function() { // Access languageobj with lang console.log(lang.param1); }; new Modules(); })(languageobj); If languageobj is in global scope you should access it inside anonymous function without passing as param. See: https://jsbin.com/rugarajitu/1/edit?js,console