Adding extra content to a post

Hi guys, wondering if anybody can help,

Im trying to add two extra fields to a post, as im currently using the title, content and featured image but need to add 2 more fields, one just a text field and the other with a link in. I want to be able to call these bits of info separately in the same way was you do <?php the_content(); ?> or <?php the_title(); ?>

Any suggestions?

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