Add header and footer to a external php page within wordpress

I haver a site i want to create a page template , i have made php page now only need to add header and footer , i know how to add but when i include header in that page template then it will mess due to css overwrite now i added header by javascript iframe now its looking good but i cant add footer . Write "Page Template "in your proposal so i can understand you read description Now i need a page with wordpress header and footer . site is [login to view URL] and the page is [login to view URL] and the php page which need to include is [login to view URL] and the source files is stored in platform folder in public html. My budget is 5 to 6$