Add filter to default gallery shortcode output

[tristangemus]

Right now the only way to alter the default gallery shortcode output is to use the "post_gallery" shortcode which effectively requires the developer to rewrite the entire shortcode.

There is a lot of redundancy in here since in most cases, we do not want to alter the retrieval of gallery items.

By adding a simple filter at the end of the gallery, we can save a lot of code as well as not effect anyone currently using the post_gallery filter. See my proposed patch.

[ramiy]

@tristangemus add phpDocs to the filter.

[tristangemus]

PHPDocs added, @since field may need to change depending on release.

[tristangemus]

Updated description.

[callumbw95]

Hi all,

I have just taken a look into this and when they were introduced, shortcodes were a pioneering solution that allowed complex content to be embedded in WordPress. However, with the launch of the block editor (Gutenberg), the entire paradigm for content creation has shifted. Blocks are the modern successor to shortcodes, offering a far superior user experience with direct visual manipulation, structured attributes, and easy discoverability through the block inserter.

The core development roadmap is now focused exclusively on the block editor and the ecosystem around it. The Shortcode API is considered feature-complete and is in a maintenance-only state. While critical security issues or major regressions would be addressed, new features or enhancements for the shortcode system are no longer being considered. Any new functionality of this nature should be built as a block.

For these reasons, I am closing this ticket as wontfix. The future of extensible content in WordPress is blocks, and all development efforts are directed there. However, please feel free to reopen this ticket if you wish to discuss this further.