Enhance `WP_REST_Posts_Controller` with writable `PreparedPost` and static analysis fixes#11336

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westonruter wants to merge 16 commits intoWordPress:trunkfrom

westonruter:fix/rest-posts-controller-phpstan

Commits on Mar 23, 2026

Document object shape returned by WP_REST_Posts_Controller::prepare_item_for_database()
westonruter
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Make PreparedPost object shape writable by intersecting with stdClass

westonruter
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claude
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Short-circuit with WP_Error when returned by prepare_item_for_database
westonruter
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Reuse initial valid post check for the post-before
westonruter
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Fix posts controller create_item_permissions_check static analysis issue
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Add conditional return for wp_slash()
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Add conditional return for get_post()
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Add conditional return for rest_ensure_response()
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Fix static analysis issues with WP_REST_Posts_Controller::create_item()
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Fix passing args to wp_unique_post_slug() in create and update methods
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Explain why post_type property is being set redundantly
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Ensure post onject in update_item() method
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Fix static analysis in WP_REST_Menu_Items_Controller::create_item()
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Fix static analysis with WP_REST_Autosaves_Controller::create_item()
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Fix static analysis issues with WP_REST_Attachments_Controller::insert_attachment()
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Fix static analysis issues with WP_REST_Attachments_Controller::edit_media_item()
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