APIs (category)
Rewrite API (Clean URLs)
| add_permastruct() | Add permalink structure. |
| add_rewrite_endpoint() | Adds a URL endpoint, such as /trackback/. Adds additional rewrite rules for friendly URL - adds the specified endpoint. |
| add_rewrite_rule() | Adds a rewrite rule that transforms a URL structure to a set of query vars. |
| add_rewrite_tag() | Add a new rewrite tag (like %postname%). |
| flush_rewrite_rules() | Remove rewrite rules and then recreate rewrite rules. |
| remove_permastruct() | Removes a permalink structure. |
| remove_rewrite_tag() | Removes an existing rewrite tag (like %postname%). |
Settings API
| add_settings_error() | Register a settings error to be displayed to the user |
| add_settings_field() | Add a new field to a section of a settings page |
| add_settings_section() | Add a new section to a settings page. |
| do_settings_fields() | Print out the settings fields for a particular settings section |
| do_settings_sections() | Prints out all settings sections added to a particular settings page |
| get_settings_errors() | Fetch settings errors registered by add_settings_error() |
| register_setting() | Registers a new option and a callback function to handle the option value when it is saved to the database. |
| settings_errors() | Display settings errors registered by add_settings_error(). |
| settings_fields() | Output nonce, action, and option_page fields for a settings page. |
| unregister_setting() | Unregister a setting. |
Cron API
| do_enclose() | Check content for video and audio links to add as enclosures. |
| wp_clear_scheduled_hook() | Unschedules all events attached to the hook with the specified arguments. |
| wp_cron() | Run all scheduled cron events whose time has come. |
| wp_doing_cron() | Determines whether the current request is a WordPress cron request. |
| wp_get_scheduled_event() | Retrieve a scheduled event. |
| wp_get_schedules() | Retrieve supported event recurrence schedules. |
| wp_next_scheduled() | Retrieve the next timestamp for an event. |
| wp_schedule_event() | Schedule a recurring event. |
| wp_schedule_single_event() | Schedules an event to run only once. |
| wp_unschedule_event() | Unschedule a previously scheduled event. |
| wp_unschedule_hook() | Unschedules all events attached to the hook. |
REST API
| get_rest_url() | Retrieves the URL to a REST endpoint on a site. |
| register_rest_field() | Registers a new field on an existing WordPress object type. |
| register_rest_route() | Registers a REST API route. |
| rest_ensure_response() | Ensures a REST response is a response object (for consistency). |
| rest_is_boolean() | Determines if a given value is a boolean or boolean-like. Doesn't look at the type of a given value, and like in PHP, |
| rest_output_link_wp_head() | Displays a link to the root REST API route in the <head> section on all site pages. |
| rest_sanitize_array() | Converts an array-like value to an array. |
| rest_stabilize_value() | Stabilizes a value following JSON Schema semantics. |
| rest_url() | Retrieves the URL to a REST endpoint. |
| WP_Application_Passwords::create_new_application_password() | Creates a new application password. |
| wp_authenticate_application_password() | Authenticates the user using an application password. |
| wp_generate_uuid4() | Generates an identifier - a random unique string consisting of letters and numbers. Creates UUID (Universally unique identifier) version 4. |
| wp_is_application_passwords_available() | Checks if Application Passwords is globally available. |
| wp_is_rest_endpoint() | Checks whether a REST API endpoint request is currently being handled. |
| wp_is_uuid() | Checks if the specified string is a UUID string. |
HTTP API
| status_header() | Set HTTP status header. |
| wp_get_http_headers() | Retrieve HTTP Headers from URL. |
| wp_remote_get() | Retrieve the raw response from the HTTP request using the GET method. It's a wrapper for curl. The result includes HTTP headers and content of the webpage, and returned in the form of an array. |
| wp_remote_head() | Retrieve the raw response from the HTTP request using the HEAD method. |
| wp_remote_post() | Gets a remote page using the HTTP POST method. The result includes HTTP headers and content of the webpage and returned in the form of an array. It's a wrapper for curl. |
| wp_remote_request() | Creates any type of HTTP request and returns the response of the request as an array. |
| wp_remote_retrieve_body() | Retrieves the content (body) of a response which was retrieved by any of the functions like wp_remote_*(), for example wp_remote_get(). |
| wp_remote_retrieve_cookie() | Retrieve a single cookie by name from the raw response. |
| wp_remote_retrieve_cookie_value() | Retrieve the value of the specified cookie from the passed query response. |
| wp_remote_retrieve_cookies() | Retrieve only the cookies from the raw response. |
| wp_remote_retrieve_header() | Retrieve a single header by name from the raw response. |
| wp_remote_retrieve_headers() | Retrieve only the headers from the raw response. |
| wp_remote_retrieve_response_code() | Retrieve only the response code from the raw response. |
| wp_remote_retrieve_response_message() | Retrieve only the response message from the raw response. |
| wp_safe_remote_request() | Retrieve the raw response from a safe HTTP request. |