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Project Type: WordPress Reference

Interactivity API

Server-side processing of interactive directives for WordPress blocks. Since: 6.5.0 Source: wp-includes/interactivity-api/ Components Component Description functions.md Global wrapper functions class-wp-interactivity-api.md Main API class with all processing logic directives.md All data-wp-*...

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WP_MatchesMapRegex

Helper class for replacing $matches[] references in query strings without using eval(). Source: wp-includes/class-wp-matchesmapregex.php Since: 2.9.0 Overview This class provides a safe way to substitute $matches[n] placeholders in rewrite rule...

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WP_Meta_Query

SQL generator for meta (custom field) queries. Source: wp-includes/class-wp-meta-query.php Since: 3.2.0 Overview WP_Meta_Query generates SQL JOIN and WHERE clauses for filtering database queries by metadata. It's the engine behind the...

February 12, 2026 Read More

WP_Tax_Query

SQL generator for taxonomy term queries. Source: wp-includes/class-wp-tax-query.php Since: 3.1.0 Overview WP_Tax_Query generates SQL JOIN and WHERE clauses for filtering database queries by taxonomy terms. It powers the tax_query parameter...

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WP_Textdomain_Registry

Registry for managing translation file locations. Source: wp-includes/class-wp-textdomain-registry.php Since: 6.1.0 Overview The WP_Textdomain_Registry class manages the mapping between text domains and their translation file locations. It enables just-in-time loading of...

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WP_Token_Map

High-performance data structure for string key-to-value lookups with optimized memory layout. Source: wp-includes/class-wp-token-map.php Since: 6.6.0 Overview WP_Token_Map provides efficient string token lookup and transformation. It's optimized for static datasets like...

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HTTPS Hooks

Filters for customizing HTTPS detection and migration behavior. Filters pre_wp_get_https_detection_errors Short-circuits the HTTPS detection process. apply_filters( 'pre_wp_get_https_detection_errors', null|WP_Error $pre ) Since: 6.4.0 Parameter Type Description $pre null|WP_Error Return WP_Error to...

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HTTPS Detection & Migration

Framework for detecting HTTPS support and migrating sites from HTTP to HTTPS. Since: 5.7.0 Source: wp-includes/https-detection.php, wp-includes/https-migration.php Components Component Description functions.md Detection and migration functions hooks.md Filters for customizing behavior...

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WP_Interactivity_API

Main class for server-side Interactivity API processing. Source: wp-includes/interactivity-api/class-wp-interactivity-api.php Since: 6.5.0 final class WP_Interactivity_API Properties $directive_processors private static array $directive_processors Maps directive attribute names to their processor methods. Value: array(...

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Interactivity API Directives

All data-wp-* directive attributes processed by the Interactivity API. Source: wp-includes/interactivity-api/class-wp-interactivity-api.php Since: 6.5.0 Directive Syntax data-wp-{directive}[--{suffix}][---{unique-id}]="[namespace::]{value}" directive: The directive name (e.g., bind, class, text) suffix: Modifier for the directive (e.g.,...

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