Another option is to use the do_shortcode() function. This will make WordPress run the shortcode as if it was in the content editor.
So where you want your post tags to appear just put.
<?php echo do_shortcode('[post_tags]'); ?>
Another option is to use the do_shortcode() function. This will make WordPress run the shortcode as if it was in the content editor.
So where you want your post tags to appear just put.
<?php echo do_shortcode('[post_tags]'); ?>