Displaying custom post data using filter functions
Once we have captured additional data in the post editor, the next logical step is to add code to display it when visitors view posts and pages. In the case of our source link data, the most logical place to show this link is after each post's content, which can easily be accomplished by assigning a function to the the_content
filter.
Getting ready
You should have already followed the Capturing and displaying information using custom meta boxes recipe to have a starting point for this recipe. The resulting plugin should still be active in your development site. Alternatively, you can get the resulting code (ch5/ch5-post-source-link/ch5-post-source-link-v1.php
) from the book's GitHub page and rename the file ch5-post-source-link.php
.
How to do it...
Follow these steps to create a filter function to display the source data associated with a post or page item as a clean link:
- Navigate to the
ch5-post-source...