If you want to check if the current url contains a string use
window.location.href.indexOf
Here is a simple example which checks if the current url contain wthe world category.
$(document).ready(function () { if(window.location.href.indexOf("category") > -1) { alert("the url contains category"); } else { alert("the url doesn't contain category");} });
It could be www.snippetbay.com/category/php