Duplicate Post Exclusion for Query Loop Block

Duplicate Post Exclusion for Query Loop Block adds a toggle to the native core/query (Query Loop) block so posts already shown by another Query Loop on the same page are not displayed again.

This is automatic deduplication for the block editor: when you place several Query Loops on one page (for example a featured list above a recent-posts list), each enabled loop skips the posts already rendered above it, keeping every post unique on the page.

How it works

1. Edit a Query Loop block in the block editor.
2. In the sidebar, enable Make posts unique on page.
3. Enable the same option on any other Query Loops that should respect prior results.
4. On the front end, each enabled loop excludes post IDs already rendered by previous enabled loops.

Features

• Extends the core Query Loop block — no custom block or variation required.
• Uses official hooks: query_loop_block_query_vars and render_block.
• No extra database queries; only adjusts existing query arguments.
• Per-request in-memory registry (no transients or options).
• Compatible with Query Loop variations such as Advanced Query Loop.

Requirements

• WordPress 6.7 or later
• PHP 7.4 or later