How do I add meta tags from a template?

Question

I'm developing a website using WordPress as my Framework. The templates are highly customized and really doesn't use much of Wordpress's features. I just use it for registering users and publish a few articles here and there. One of the templates is a product template. In this template I retrieve product information based on product ID sent in the URL. What I want to do, is to take info from this product and add it to my tags. According to Wordpress documentation, headers are loaded before templates. So, how can I add meta tag information based on data loaded in my template? Do I have to query the database "a second time" in the header in order to retrieve the data wanted? I know Wordpress has some functionality for this, since article titles can be retrieved in the header file. But I'm not sure how I can take advantage of this. JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

Even though header is loaded before template, few global variable are available even before header is loaded and $post is one of them which hold post data + metadata. So you can access post meta in header as well. global $post; echo get_post_meta($post->ID, 'ur_meta_key', true);