如何使用<a href>或链接从<select>标记获取值

Question

Good day! I've got a problem with my code. We all know that we can only get the value of a <select> or dropdown through POST and GET method (in submit button) and document.getElementById (in <button> and pass it through ajax to use it on PHP), my problem is I want to use <a> tag because I'm going to generate or download an excel file (using PHPExcel) from the href attribute of the </a>, the data that will be processed and download by the link will be filtered based on the value of the <select>, so is there any possible way to get the value of <select>, process it on the page wherein <a> will be redirected? Thank you!