The previous_post() WordPress PHP function displays a link to the previous post.
Usage
previous_post($format = '%', $previous = 'previous post: ', $title = 'yes', $in_same_cat = 'no', $limitprev = 1, $excluded_categories = '');
Parameters
$format(string) Optional. Default: ‘%’. Determines the format of the link.$previous(string) Optional. Default: ‘previous post: ‘. The text to display before the post title.$title(string) Optional. Default: ‘yes’. Whether to show the post title in the link.$in_same_cat(string) Optional. Default: ‘no’. Whether to show only previous posts from the same category.$limitprev(int) Optional. Default: 1. Limit the number of previous posts to display.$excluded_categories(string) Optional. Default: ”. A comma-separated list of category IDs to exclude.
More information
See WordPress Developer Resources: previous_post
Examples
Display a simple previous post link
previous_post(); // Output: "<a href="previous-post-url">previous post: Previous Post Title</a>"
Display previous post link with custom format and text
previous_post('« %', 'Check out: ', 'yes');
// Output: "<a href="previous-post-url">Check out: Previous Post Title</a>"
Display previous post link without post title
previous_post('« %', 'Go back to the previous post: ', 'no');
// Output: "<a href="previous-post-url">Go back to the previous post:</a>"
Display previous post link within the same category
previous_post('« %', 'Previous post in the same category: ', 'yes', 'yes');
// Output: "<a href="previous-post-url">Previous post in the same category: Previous Post Title</a>"
Display previous post link excluding certain categories
previous_post('« %', 'Previous post: ', 'yes', 'no', 1, '3,5');
// Output: "<a href="previous-post-url">Previous post: Previous Post Title</a>"