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Project Type: WordPress Reference

WP_Styles

Core class for registering and outputting CSS stylesheets. Source: wp-includes/class-wp-styles.php Since: 2.6.0 Extends: WP_Dependencies Properties Public Properties Property Type Since Description $base_url string 2.6.0 Base URL for styles (trailing slash)...

February 12, 2026 Read More

Scripts & Styles Functions

Core functions for managing JavaScript and CSS assets. Source: wp-includes/functions.wp-scripts.php, wp-includes/functions.wp-styles.php, wp-includes/script-loader.php Script Functions wp_scripts() Initializes and returns the global WP_Scripts instance. wp_scripts(): WP_Scripts Since: 4.2.0 Returns: WP_Scripts instance. wp_register_script()...

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wp-mail.php

Purpose Implements Post by Email: pulls messages from a configured POP3 mailbox and turns them into posts. Flow Loads WordPress and checks enable_post_by_email_configuration filter. Validates mailserver settings and rate-limits execution....

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wp-settings.php

Purpose Core bootstrap that initializes WordPress: loads core libraries, sets constants, configures DB/cache, loads plugins and themes, and fires the key lifecycle hooks (init, wp_loaded). Flow Defines WPINC and loads...

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wp-signup.php

Purpose Multisite signup handler for new users and/or new sites, including validation and form rendering. Flow Loads WordPress (wp-load.php) and front-end context (wp-blog-header.php). Ensures multisite and main-site context; otherwise redirects....

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wp-trackback.php

Purpose Handles incoming trackbacks/pingbacks, validates data, and creates trackback comments. Flow Loads WordPress and runs wp( array( 'tb' => '1' ) ) when needed. Runs as unauthenticated user. Parses and...

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xmlrpc.php

Purpose XML-RPC endpoint for remote publishing and legacy APIs (MetaWeblog, Blogger, MovableType, etc.). Flow Defines XMLRPC_REQUEST and clears cookies. Reads raw POST body and loads WordPress. If ?rsd is requested,...

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WP_Script_Modules Class

Core class for registering and managing script modules. Since: 6.5.0 Source: wp-includes/class-wp-script-modules.php Properties Private Properties Property Type Description $registered array<string, array> Registered script modules, keyed by ID $queue string[] IDs...

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wp-load.php

Purpose Bootstraps WordPress by defining ABSPATH and loading wp-config.php, which then loads wp-settings.php. If no config exists, it initiates the setup flow. Flow Defines ABSPATH to the WordPress root if...

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wp-login.php

Purpose Handles authentication-related flows: login, logout, registration, password reset, and admin email confirmation. Flow Loads WordPress via wp-load.php and enforces SSL if required. Determines the $action (login, logout, lostpassword, resetpass,...

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