/**
* Post API: Walker_Page class
*
* @package WordPress
* @subpackage Template
* @since 4.4.0
*/
/**
* Core walker class used to create an HTML list of pages.
*
* @since 2.1.0
*
* @see Walker
*/
class Walker_Page extends Walker {
/**
* What the class handles.
*
* @since 2.1.0
* @var string
*
* @see Walker::$tree_type
*/
public $tree_type = 'page';
/**
* Database fields to use.
*
* @since 2.1.0
* @var string[]
*
* @see Walker::$db_fields
* @todo Decouple this.
*/
public $db_fields = array(
'parent' => 'post_parent',
'id' => 'ID',
);
/**
* Outputs the beginning of the current level in the tree before elements are output.
*
* @since 2.1.0
*
* @see Walker::start_lvl()
*
* @param string $output Used to append additional content (passed by reference).
* @param int $depth Optional. Depth of page. Used for padding. Default 0.
* @param array $args Optional. Arguments for outputting the next level.
* Default empty array.
*/
public function start_lvl( &$output, $depth = 0, $args = array() ) {
if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) {
$t = "\t";
$n = "\n";
} else {
$t = '';
$n = '';
}
$indent = str_repeat( $t, $depth );
$output .= "{$n}{$indent}{$n}";
}
/**
* Outputs the end of the current level in the tree after elements are output.
*
* @since 2.1.0
*
* @see Walker::end_lvl()
*
* @param string $output Used to append additional content (passed by reference).
* @param int $depth Optional. Depth of page. Used for padding. Default 0.
* @param array $args Optional. Arguments for outputting the end of the current level.
* Default empty array.
*/
public function end_lvl( &$output, $depth = 0, $args = array() ) {
if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) {
$t = "\t";
$n = "\n";
} else {
$t = '';
$n = '';
}
$indent = str_repeat( $t, $depth );
$output .= "{$indent}
{$n}";
}
/**
* Outputs the beginning of the current element in the tree.
*
* @see Walker::start_el()
* @since 2.1.0
* @since 5.9.0 Renamed `$page` to `$data_object` and `$current_page` to `$current_object_id`
* to match parent class for PHP 8 named parameter support.
*
* @param string $output Used to append additional content. Passed by reference.
* @param WP_Post $data_object Page data object.
* @param int $depth Optional. Depth of page. Used for padding. Default 0.
* @param array $args Optional. Array of arguments. Default empty array.
* @param int $current_object_id Optional. ID of the current page. Default 0.
*/
public function start_el( &$output, $data_object, $depth = 0, $args = array(), $current_object_id = 0 ) {
// Restores the more descriptive, specific name for use within this method.
$page = $data_object;
$current_page_id = $current_object_id;
if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) {
$t = "\t";
$n = "\n";
} else {
$t = '';
$n = '';
}
if ( $depth ) {
$indent = str_repeat( $t, $depth );
} else {
$indent = '';
}
$css_class = array( 'page_item', 'page-item-' . $page->ID );
if ( isset( $args['pages_with_children'][ $page->ID ] ) ) {
$css_class[] = 'page_item_has_children';
}
if ( ! empty( $current_page_id ) ) {
$_current_page = get_post( $current_page_id );
if ( $_current_page && in_array( $page->ID, $_current_page->ancestors, true ) ) {
$css_class[] = 'current_page_ancestor';
}
if ( $page->ID === (int) $current_page_id ) {
$css_class[] = 'current_page_item';
} elseif ( $_current_page && $page->ID === $_current_page->post_parent ) {
$css_class[] = 'current_page_parent';
}
} elseif ( (int) get_option( 'page_for_posts' ) === $page->ID ) {
$css_class[] = 'current_page_parent';
}
/**
* Filters the list of CSS classes to include with each page item in the list.
*
* @since 2.8.0
*
* @see wp_list_pages()
*
* @param string[] $css_class An array of CSS classes to be applied to each list item.
* @param WP_Post $page Page data object.
* @param int $depth Depth of page, used for padding.
* @param array $args An array of arguments.
* @param int $current_page_id ID of the current page.
*/
$css_classes = implode( ' ', apply_filters( 'page_css_class', $css_class, $page, $depth, $args, $current_page_id ) );
$css_classes = $css_classes ? ' class="' . esc_attr( $css_classes ) . '"' : '';
if ( '' === $page->post_title ) {
/* translators: %d: ID of a post. */
$page->post_title = sprintf( __( '#%d (no title)' ), $page->ID );
}
$args['link_before'] = empty( $args['link_before'] ) ? '' : $args['link_before'];
$args['link_after'] = empty( $args['link_after'] ) ? '' : $args['link_after'];
$atts = array();
$atts['href'] = get_permalink( $page->ID );
$atts['aria-current'] = ( $page->ID === (int) $current_page_id ) ? 'page' : '';
/**
* Filters the HTML attributes applied to a page menu item's anchor element.
*
* @since 4.8.0
*
* @param array $atts {
* The HTML attributes applied to the menu item's `` element, empty strings are ignored.
*
* @type string $href The href attribute.
* @type string $aria-current The aria-current attribute.
* }
* @param WP_Post $page Page data object.
* @param int $depth Depth of page, used for padding.
* @param array $args An array of arguments.
* @param int $current_page_id ID of the current page.
*/
$atts = apply_filters( 'page_menu_link_attributes', $atts, $page, $depth, $args, $current_page_id );
$attributes = '';
foreach ( $atts as $attr => $value ) {
if ( is_scalar( $value ) && '' !== $value && false !== $value ) {
$value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
$attributes .= ' ' . $attr . '="' . $value . '"';
}
}
$output .= $indent . sprintf(
'%s%s%s',
$css_classes,
$attributes,
$args['link_before'],
/** This filter is documented in wp-includes/post-template.php */
apply_filters( 'the_title', $page->post_title, $page->ID ),
$args['link_after']
);
if ( ! empty( $args['show_date'] ) ) {
if ( 'modified' === $args['show_date'] ) {
$time = $page->post_modified;
} else {
$time = $page->post_date;
}
$date_format = empty( $args['date_format'] ) ? '' : $args['date_format'];
$output .= ' ' . mysql2date( $date_format, $time );
}
}
/**
* Outputs the end of the current element in the tree.
*
* @since 2.1.0
* @since 5.9.0 Renamed `$page` to `$data_object` to match parent class for PHP 8 named parameter support.
*
* @see Walker::end_el()
*
* @param string $output Used to append additional content. Passed by reference.
* @param WP_Post $data_object Page data object. Not used.
* @param int $depth Optional. Depth of page. Default 0 (unused).
* @param array $args Optional. Array of arguments. Default empty array.
*/
public function end_el( &$output, $data_object, $depth = 0, $args = array() ) {
if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) {
$t = "\t";
$n = "\n";
} else {
$t = '';
$n = '';
}
$output .= "{$n}";
}
}
/**
* WordPress Post Thumbnail Template Functions.
*
* Support for post thumbnails.
* Theme's functions.php must call add_theme_support( 'post-thumbnails' ) to use these.
*
* @package WordPress
* @subpackage Template
*/
/**
* Determines whether a post has an image attached.
*
* For more information on this and similar theme functions, check out
* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
* Conditional Tags} article in the Theme Developer Handbook.
*
* @since 2.9.0
* @since 4.4.0 `$post` can be a post ID or WP_Post object.
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
* @return bool Whether the post has an image attached.
*/
function has_post_thumbnail( $post = null ) {
$thumbnail_id = get_post_thumbnail_id( $post );
$has_thumbnail = (bool) $thumbnail_id;
/**
* Filters whether a post has a post thumbnail.
*
* @since 5.1.0
*
* @param bool $has_thumbnail true if the post has a post thumbnail, otherwise false.
* @param int|WP_Post|null $post Post ID or WP_Post object. Default is global `$post`.
* @param int|false $thumbnail_id Post thumbnail ID or false if the post does not exist.
*/
return (bool) apply_filters( 'has_post_thumbnail', $has_thumbnail, $post, $thumbnail_id );
}
/**
* Retrieves the post thumbnail ID.
*
* @since 2.9.0
* @since 4.4.0 `$post` can be a post ID or WP_Post object.
* @since 5.5.0 The return value for a non-existing post
* was changed to false instead of an empty string.
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
* @return int|false Post thumbnail ID (which can be 0 if the thumbnail is not set),
* or false if the post does not exist.
*/
function get_post_thumbnail_id( $post = null ) {
$post = get_post( $post );
if ( ! $post ) {
return false;
}
$thumbnail_id = (int) get_post_meta( $post->ID, '_thumbnail_id', true );
/**
* Filters the post thumbnail ID.
*
* @since 5.9.0
*
* @param int|false $thumbnail_id Post thumbnail ID or false if the post does not exist.
* @param int|WP_Post|null $post Post ID or WP_Post object. Default is global `$post`.
*/
return (int) apply_filters( 'post_thumbnail_id', $thumbnail_id, $post );
}
/**
* Displays the post thumbnail.
*
* When a theme adds 'post-thumbnail' support, a special 'post-thumbnail' image size
* is registered, which differs from the 'thumbnail' image size managed via the
* Settings > Media screen.
*
* When using the_post_thumbnail() or related functions, the 'post-thumbnail' image
* size is used by default, though a different size can be specified instead as needed.
*
* @since 2.9.0
*
* @see get_the_post_thumbnail()
*
* @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array of
* width and height values in pixels (in that order). Default 'post-thumbnail'.
* @param string|array $attr Optional. Query string or array of attributes. Default empty.
*/
function the_post_thumbnail( $size = 'post-thumbnail', $attr = '' ) {
echo get_the_post_thumbnail( null, $size, $attr );
}
/**
* Updates cache for thumbnails in the current loop.
*
* @since 3.2.0
*
* @global WP_Query $wp_query WordPress Query object.
*
* @param WP_Query $wp_query Optional. A WP_Query instance. Defaults to the $wp_query global.
*/
function update_post_thumbnail_cache( $wp_query = null ) {
if ( ! $wp_query ) {
$wp_query = $GLOBALS['wp_query'];
}
if ( $wp_query->thumbnails_cached ) {
return;
}
$thumb_ids = array();
/*
* $wp_query may contain an array of post objects or post IDs.
*
* This ensures the cache is primed for all post objects to avoid
* `get_post()` calls in `get_the_post_thumbnail()` triggering an
* additional database call for each post.
*/
$parent_post_ids = array();
foreach ( $wp_query->posts as $post ) {
if ( $post instanceof WP_Post ) {
$parent_post_ids[] = $post->ID;
} elseif ( is_int( $post ) ) {
$parent_post_ids[] = $post;
}
}
_prime_post_caches( $parent_post_ids, false, true );
foreach ( $wp_query->posts as $post ) {
$id = get_post_thumbnail_id( $post );
if ( $id ) {
$thumb_ids[] = $id;
}
}
if ( ! empty( $thumb_ids ) ) {
_prime_post_caches( $thumb_ids, false, true );
}
$wp_query->thumbnails_cached = true;
}
/**
* Retrieves the post thumbnail.
*
* When a theme adds 'post-thumbnail' support, a special 'post-thumbnail' image size
* is registered, which differs from the 'thumbnail' image size managed via the
* Settings > Media screen.
*
* When using the_post_thumbnail() or related functions, the 'post-thumbnail' image
* size is used by default, though a different size can be specified instead as needed.
*
* @since 2.9.0
* @since 4.4.0 `$post` can be a post ID or WP_Post object.
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
* @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array of
* width and height values in pixels (in that order). Default 'post-thumbnail'.
* @param string|array $attr Optional. Query string or array of attributes. Default empty.
* @return string The post thumbnail image tag.
*/
function get_the_post_thumbnail( $post = null, $size = 'post-thumbnail', $attr = '' ) {
$post = get_post( $post );
if ( ! $post ) {
return '';
}
$post_thumbnail_id = get_post_thumbnail_id( $post );
/**
* Filters the post thumbnail size.
*
* @since 2.9.0
* @since 4.9.0 Added the `$post_id` parameter.
*
* @param string|int[] $size Requested image size. Can be any registered image size name, or
* an array of width and height values in pixels (in that order).
* @param int $post_id The post ID.
*/
$size = apply_filters( 'post_thumbnail_size', $size, $post->ID );
if ( $post_thumbnail_id ) {
/**
* Fires before fetching the post thumbnail HTML.
*
* Provides "just in time" filtering of all filters in wp_get_attachment_image().
*
* @since 2.9.0
*
* @param int $post_id The post ID.
* @param int $post_thumbnail_id The post thumbnail ID.
* @param string|int[] $size Requested image size. Can be any registered image size name, or
* an array of width and height values in pixels (in that order).
*/
do_action( 'begin_fetch_post_thumbnail_html', $post->ID, $post_thumbnail_id, $size );
if ( in_the_loop() ) {
update_post_thumbnail_cache();
}
$html = wp_get_attachment_image( $post_thumbnail_id, $size, false, $attr );
/**
* Fires after fetching the post thumbnail HTML.
*
* @since 2.9.0
*
* @param int $post_id The post ID.
* @param int $post_thumbnail_id The post thumbnail ID.
* @param string|int[] $size Requested image size. Can be any registered image size name, or
* an array of width and height values in pixels (in that order).
*/
do_action( 'end_fetch_post_thumbnail_html', $post->ID, $post_thumbnail_id, $size );
} else {
$html = '';
}
/**
* Filters the post thumbnail HTML.
*
* @since 2.9.0
*
* @param string $html The post thumbnail HTML.
* @param int $post_id The post ID.
* @param int $post_thumbnail_id The post thumbnail ID, or 0 if there isn't one.
* @param string|int[] $size Requested image size. Can be any registered image size name, or
* an array of width and height values in pixels (in that order).
* @param string|array $attr Query string or array of attributes.
*/
return apply_filters( 'post_thumbnail_html', $html, $post->ID, $post_thumbnail_id, $size, $attr );
}
/**
* Returns the post thumbnail URL.
*
* @since 4.4.0
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
* @param string|int[] $size Optional. Registered image size to retrieve the source for or a flat array
* of height and width dimensions. Default 'post-thumbnail'.
* @return string|false Post thumbnail URL or false if no image is available. If `$size` does not match
* any registered image size, the original image URL will be returned.
*/
function get_the_post_thumbnail_url( $post = null, $size = 'post-thumbnail' ) {
$post_thumbnail_id = get_post_thumbnail_id( $post );
if ( ! $post_thumbnail_id ) {
return false;
}
$thumbnail_url = wp_get_attachment_image_url( $post_thumbnail_id, $size );
/**
* Filters the post thumbnail URL.
*
* @since 5.9.0
*
* @param string|false $thumbnail_url Post thumbnail URL or false if the post does not exist.
* @param int|WP_Post|null $post Post ID or WP_Post object. Default is global `$post`.
* @param string|int[] $size Registered image size to retrieve the source for or a flat array
* of height and width dimensions. Default 'post-thumbnail'.
*/
return apply_filters( 'post_thumbnail_url', $thumbnail_url, $post, $size );
}
/**
* Displays the post thumbnail URL.
*
* @since 4.4.0
*
* @param string|int[] $size Optional. Image size to use. Accepts any valid image size,
* or an array of width and height values in pixels (in that order).
* Default 'post-thumbnail'.
*/
function the_post_thumbnail_url( $size = 'post-thumbnail' ) {
$url = get_the_post_thumbnail_url( null, $size );
if ( $url ) {
echo esc_url( $url );
}
}
/**
* Returns the post thumbnail caption.
*
* @since 4.6.0
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
* @return string Post thumbnail caption.
*/
function get_the_post_thumbnail_caption( $post = null ) {
$post_thumbnail_id = get_post_thumbnail_id( $post );
if ( ! $post_thumbnail_id ) {
return '';
}
$caption = wp_get_attachment_caption( $post_thumbnail_id );
if ( ! $caption ) {
$caption = '';
}
return $caption;
}
/**
* Displays the post thumbnail caption.
*
* @since 4.6.0
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
*/
function the_post_thumbnail_caption( $post = null ) {
/**
* Filters the displayed post thumbnail caption.
*
* @since 4.6.0
*
* @param string $caption Caption for the given attachment.
*/
echo apply_filters( 'the_post_thumbnail_caption', get_the_post_thumbnail_caption( $post ) );
}
/**
* Core HTTP Request API
*
* Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk
* decoding, if HTTP 1.1 and various other difficult HTTP protocol implementations.
*
* @package WordPress
* @subpackage HTTP
*/
/**
* Returns the initialized WP_Http Object
*
* @since 2.7.0
* @access private
*
* @return WP_Http HTTP Transport object.
*/
function _wp_http_get_object() {
static $http = null;
if ( is_null( $http ) ) {
$http = new WP_Http();
}
return $http;
}
/**
* Retrieves the raw response from a safe HTTP request.
*
* This function is ideal when the HTTP request is being made to an arbitrary
* URL. The URL, and every URL it redirects to, are validated with wp_http_validate_url()
* to avoid Server Side Request Forgery attacks (SSRF).
*
* @since 3.6.0
*
* @see wp_remote_request() For more information on the response array format.
* @see WP_Http::request() For default arguments information.
* @see wp_http_validate_url() For more information about how the URL is validated.
*
* @link https://owasp.org/www-community/attacks/Server_Side_Request_Forgery
*
* @param string $url URL to retrieve.
* @param array $args Optional. Request arguments. Default empty array.
* See WP_Http::request() for information on accepted arguments.
* @return array|WP_Error The response or WP_Error on failure.
* See WP_Http::request() for information on return value.
*/
function wp_safe_remote_request( $url, $args = array() ) {
$args['reject_unsafe_urls'] = true;
$http = _wp_http_get_object();
return $http->request( $url, $args );
}
/**
* Retrieves the raw response from a safe HTTP request using the GET method.
*
* This function is ideal when the HTTP request is being made to an arbitrary
* URL. The URL, and every URL it redirects to, are validated with wp_http_validate_url()
* to avoid Server Side Request Forgery attacks (SSRF).
*
* @since 3.6.0
*
* @see wp_remote_request() For more information on the response array format.
* @see WP_Http::request() For default arguments information.
* @see wp_http_validate_url() For more information about how the URL is validated.
*
* @link https://owasp.org/www-community/attacks/Server_Side_Request_Forgery
*
* @param string $url URL to retrieve.
* @param array $args Optional. Request arguments. Default empty array.
* See WP_Http::request() for information on accepted arguments.
* @return array|WP_Error The response or WP_Error on failure.
* See WP_Http::request() for information on return value.
*/
function wp_safe_remote_get( $url, $args = array() ) {
$args['reject_unsafe_urls'] = true;
$http = _wp_http_get_object();
return $http->get( $url, $args );
}
/**
* Retrieves the raw response from a safe HTTP request using the POST method.
*
* This function is ideal when the HTTP request is being made to an arbitrary
* URL. The URL, and every URL it redirects to, are validated with wp_http_validate_url()
* to avoid Server Side Request Forgery attacks (SSRF).
*
* @since 3.6.0
*
* @see wp_remote_request() For more information on the response array format.
* @see WP_Http::request() For default arguments information.
* @see wp_http_validate_url() For more information about how the URL is validated.
*
* @link https://owasp.org/www-community/attacks/Server_Side_Request_Forgery
*
* @param string $url URL to retrieve.
* @param array $args Optional. Request arguments. Default empty array.
* See WP_Http::request() for information on accepted arguments.
* @return array|WP_Error The response or WP_Error on failure.
* See WP_Http::request() for information on return value.
*/
function wp_safe_remote_post( $url, $args = array() ) {
$args['reject_unsafe_urls'] = true;
$http = _wp_http_get_object();
return $http->post( $url, $args );
}
/**
* Retrieves the raw response from a safe HTTP request using the HEAD method.
*
* This function is ideal when the HTTP request is being made to an arbitrary
* URL. The URL, and every URL it redirects to, are validated with wp_http_validate_url()
* to avoid Server Side Request Forgery attacks (SSRF).
*
* @since 3.6.0
*
* @see wp_remote_request() For more information on the response array format.
* @see WP_Http::request() For default arguments information.
* @see wp_http_validate_url() For more information about how the URL is validated.
*
* @link https://owasp.org/www-community/attacks/Server_Side_Request_Forgery
*
* @param string $url URL to retrieve.
* @param array $args Optional. Request arguments. Default empty array.
* See WP_Http::request() for information on accepted arguments.
* @return array|WP_Error The response or WP_Error on failure.
* See WP_Http::request() for information on return value.
*/
function wp_safe_remote_head( $url, $args = array() ) {
$args['reject_unsafe_urls'] = true;
$http = _wp_http_get_object();
return $http->head( $url, $args );
}
/**
* Performs an HTTP request and returns its response.
*
* There are other API functions available which abstract away the HTTP method:
*
* - Default 'GET' for wp_remote_get()
* - Default 'POST' for wp_remote_post()
* - Default 'HEAD' for wp_remote_head()
*
* @since 2.7.0
*
* @see WP_Http::request() For information on default arguments.
*
* @param string $url URL to retrieve.
* @param array $args Optional. Request arguments. Default empty array.
* See WP_Http::request() for information on accepted arguments.
* @return array|WP_Error The response array or a WP_Error on failure.
* See WP_Http::request() for information on return value.
*/
function wp_remote_request( $url, $args = array() ) {
$http = _wp_http_get_object();
return $http->request( $url, $args );
}
/**
* Performs an HTTP request using the GET method and returns its response.
*
* @since 2.7.0
*
* @see wp_remote_request() For more information on the response array format.
* @see WP_Http::request() For default arguments information.
*
* @param string $url URL to retrieve.
* @param array $args Optional. Request arguments. Default empty array.
* See WP_Http::request() for information on accepted arguments.
* @return array|WP_Error The response or WP_Error on failure.
* See WP_Http::request() for information on return value.
*/
function wp_remote_get( $url, $args = array() ) {
$http = _wp_http_get_object();
return $http->get( $url, $args );
}
/**
* Performs an HTTP request using the POST method and returns its response.
*
* @since 2.7.0
*
* @see wp_remote_request() For more information on the response array format.
* @see WP_Http::request() For default arguments information.
*
* @param string $url URL to retrieve.
* @param array $args Optional. Request arguments. Default empty array.
* See WP_Http::request() for information on accepted arguments.
* @return array|WP_Error The response or WP_Error on failure.
* See WP_Http::request() for information on return value.
*/
function wp_remote_post( $url, $args = array() ) {
$http = _wp_http_get_object();
return $http->post( $url, $args );
}
/**
* Performs an HTTP request using the HEAD method and returns its response.
*
* @since 2.7.0
*
* @see wp_remote_request() For more information on the response array format.
* @see WP_Http::request() For default arguments information.
*
* @param string $url URL to retrieve.
* @param array $args Optional. Request arguments. Default empty array.
* See WP_Http::request() for information on accepted arguments.
* @return array|WP_Error The response or WP_Error on failure.
* See WP_Http::request() for information on return value.
*/
function wp_remote_head( $url, $args = array() ) {
$http = _wp_http_get_object();
return $http->head( $url, $args );
}
/**
* Retrieves only the headers from the raw response.
*
* @since 2.7.0
* @since 4.6.0 Return value changed from an array to an WpOrg\Requests\Utility\CaseInsensitiveDictionary instance.
*
* @see \WpOrg\Requests\Utility\CaseInsensitiveDictionary
*
* @param array|WP_Error $response HTTP response.
* @return \WpOrg\Requests\Utility\CaseInsensitiveDictionary|array The headers of the response, or empty array
* if incorrect parameter given.
*/
function wp_remote_retrieve_headers( $response ) {
if ( is_wp_error( $response ) || ! isset( $response['headers'] ) ) {
return array();
}
return $response['headers'];
}
/**
* Retrieves a single header by name from the raw response.
*
* @since 2.7.0
*
* @param array|WP_Error $response HTTP response.
* @param string $header Header name to retrieve value from.
* @return array|string The header(s) value(s). Array if multiple headers with the same name are retrieved.
* Empty string if incorrect parameter given, or if the header doesn't exist.
*/
function wp_remote_retrieve_header( $response, $header ) {
if ( is_wp_error( $response ) || ! isset( $response['headers'] ) ) {
return '';
}
if ( isset( $response['headers'][ $header ] ) ) {
return $response['headers'][ $header ];
}
return '';
}
/**
* Retrieves only the response code from the raw response.
*
* Will return an empty string if incorrect parameter value is given.
*
* @since 2.7.0
*
* @param array|WP_Error $response HTTP response.
* @return int|string The response code as an integer. Empty string if incorrect parameter given.
*/
function wp_remote_retrieve_response_code( $response ) {
if ( is_wp_error( $response ) || ! isset( $response['response'] ) || ! is_array( $response['response'] ) ) {
return '';
}
return $response['response']['code'];
}
/**
* Retrieves only the response message from the raw response.
*
* Will return an empty string if incorrect parameter value is given.
*
* @since 2.7.0
*
* @param array|WP_Error $response HTTP response.
* @return string The response message. Empty string if incorrect parameter given.
*/
function wp_remote_retrieve_response_message( $response ) {
if ( is_wp_error( $response ) || ! isset( $response['response'] ) || ! is_array( $response['response'] ) ) {
return '';
}
return $response['response']['message'];
}
/**
* Retrieves only the body from the raw response.
*
* @since 2.7.0
*
* @param array|WP_Error $response HTTP response.
* @return string The body of the response. Empty string if no body or incorrect parameter given.
*/
function wp_remote_retrieve_body( $response ) {
if ( is_wp_error( $response ) || ! isset( $response['body'] ) ) {
return '';
}
return $response['body'];
}
/**
* Retrieves only the cookies from the raw response.
*
* @since 4.4.0
*
* @param array|WP_Error $response HTTP response.
* @return WP_Http_Cookie[] An array of `WP_Http_Cookie` objects from the response.
* Empty array if there are none, or the response is a WP_Error.
*/
function wp_remote_retrieve_cookies( $response ) {
if ( is_wp_error( $response ) || empty( $response['cookies'] ) ) {
return array();
}
return $response['cookies'];
}
/**
* Retrieves a single cookie by name from the raw response.
*
* @since 4.4.0
*
* @param array|WP_Error $response HTTP response.
* @param string $name The name of the cookie to retrieve.
* @return WP_Http_Cookie|string The `WP_Http_Cookie` object, or empty string
* if the cookie is not present in the response.
*/
function wp_remote_retrieve_cookie( $response, $name ) {
$cookies = wp_remote_retrieve_cookies( $response );
if ( empty( $cookies ) ) {
return '';
}
foreach ( $cookies as $cookie ) {
if ( $cookie->name === $name ) {
return $cookie;
}
}
return '';
}
/**
* Retrieves a single cookie's value by name from the raw response.
*
* @since 4.4.0
*
* @param array|WP_Error $response HTTP response.
* @param string $name The name of the cookie to retrieve.
* @return string The value of the cookie, or empty string
* if the cookie is not present in the response.
*/
function wp_remote_retrieve_cookie_value( $response, $name ) {
$cookie = wp_remote_retrieve_cookie( $response, $name );
if ( ! ( $cookie instanceof WP_Http_Cookie ) ) {
return '';
}
return $cookie->value;
}
/**
* Determines if there is an HTTP Transport that can process this request.
*
* @since 3.2.0
*
* @param array $capabilities Array of capabilities to test or a wp_remote_request() $args array.
* @param string $url Optional. If given, will check if the URL requires SSL and adds
* that requirement to the capabilities array.
*
* @return bool
*/
function wp_http_supports( $capabilities = array(), $url = null ) {
$capabilities = wp_parse_args( $capabilities );
$count = count( $capabilities );
// If we have a numeric $capabilities array, spoof a wp_remote_request() associative $args array.
if ( $count && count( array_filter( array_keys( $capabilities ), 'is_numeric' ) ) === $count ) {
$capabilities = array_combine( array_values( $capabilities ), array_fill( 0, $count, true ) );
}
if ( $url && ! isset( $capabilities['ssl'] ) ) {
$scheme = parse_url( $url, PHP_URL_SCHEME );
if ( 'https' === $scheme || 'ssl' === $scheme ) {
$capabilities['ssl'] = true;
}
}
return WpOrg\Requests\Requests::has_capabilities( $capabilities );
}
/**
* Gets the HTTP Origin of the current request.
*
* @since 3.4.0
*
* @return string URL of the origin. Empty string if no origin.
*/
function get_http_origin() {
$origin = '';
if ( ! empty( $_SERVER['HTTP_ORIGIN'] ) ) {
$origin = $_SERVER['HTTP_ORIGIN'];
}
/**
* Changes the origin of an HTTP request.
*
* @since 3.4.0
*
* @param string $origin The original origin for the request.
*/
return apply_filters( 'http_origin', $origin );
}
/**
* Retrieves list of allowed HTTP origins.
*
* @since 3.4.0
*
* @return string[] Array of origin URLs.
*/
function get_allowed_http_origins() {
$admin_origin = parse_url( admin_url() );
$home_origin = parse_url( home_url() );
// @todo Preserve port?
$allowed_origins = array_unique(
array(
'http://' . $admin_origin['host'],
'https://' . $admin_origin['host'],
'http://' . $home_origin['host'],
'https://' . $home_origin['host'],
)
);
/**
* Changes the origin types allowed for HTTP requests.
*
* @since 3.4.0
*
* @param string[] $allowed_origins {
* Array of default allowed HTTP origins.
*
* @type string $0 Non-secure URL for admin origin.
* @type string $1 Secure URL for admin origin.
* @type string $2 Non-secure URL for home origin.
* @type string $3 Secure URL for home origin.
* }
*/
return apply_filters( 'allowed_http_origins', $allowed_origins );
}
/**
* Determines if the HTTP origin is an authorized one.
*
* @since 3.4.0
*
* @param string|null $origin Origin URL. If not provided, the value of get_http_origin() is used.
* @return string Origin URL if allowed, empty string if not.
*/
function is_allowed_http_origin( $origin = null ) {
$origin_arg = $origin;
if ( null === $origin ) {
$origin = get_http_origin();
}
if ( $origin && ! in_array( $origin, get_allowed_http_origins(), true ) ) {
$origin = '';
}
/**
* Changes the allowed HTTP origin result.
*
* @since 3.4.0
*
* @param string $origin Origin URL if allowed, empty string if not.
* @param string $origin_arg Original origin string passed into is_allowed_http_origin function.
*/
return apply_filters( 'allowed_http_origin', $origin, $origin_arg );
}
/**
* Sends Access-Control-Allow-Origin and related headers if the current request
* is from an allowed origin.
*
* If the request is an OPTIONS request, the script exits with either access
* control headers sent, or a 403 response if the origin is not allowed. For
* other request methods, you will receive a return value.
*
* @since 3.4.0
*
* @return string|false Returns the origin URL if headers are sent. Returns false
* if headers are not sent.
*/
function send_origin_headers() {
$origin = get_http_origin();
if ( is_allowed_http_origin( $origin ) ) {
header( 'Access-Control-Allow-Origin: ' . $origin );
header( 'Access-Control-Allow-Credentials: true' );
if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] ) {
exit;
}
return $origin;
}
if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] ) {
status_header( 403 );
exit;
}
return false;
}
/**
* Validates a URL for safe use in the HTTP API.
*
* Examples of URLs that are considered unsafe:
*
* - ftp://example.com/caniload.php - Invalid protocol - only http and https are allowed.
* - http:///example.com/caniload.php - Malformed URL.
* - http://user:pass@example.com/caniload.php - Login information.
* - http://example.invalid/caniload.php - Invalid hostname, as the IP cannot be looked up in DNS.
*
* Examples of URLs that are considered unsafe by default:
*
* - http://192.168.0.1/caniload.php - IPs from LAN networks.
* This can be changed with the {@see 'http_request_host_is_external'} filter.
* - http://198.143.164.252:81/caniload.php - By default, only 80, 443, and 8080 ports are allowed.
* This can be changed with the {@see 'http_allowed_safe_ports'} filter.
*
* @since 3.5.2
*
* @param string $url Request URL.
* @return string|false URL or false on failure.
*/
function wp_http_validate_url( $url ) {
if ( ! is_string( $url ) || '' === $url || is_numeric( $url ) ) {
return false;
}
$original_url = $url;
$url = wp_kses_bad_protocol( $url, array( 'http', 'https' ) );
if ( ! $url || strtolower( $url ) !== strtolower( $original_url ) ) {
return false;
}
$parsed_url = parse_url( $url );
if ( ! $parsed_url || empty( $parsed_url['host'] ) ) {
return false;
}
if ( isset( $parsed_url['user'] ) || isset( $parsed_url['pass'] ) ) {
return false;
}
if ( false !== strpbrk( $parsed_url['host'], ':#?[]' ) ) {
return false;
}
$parsed_home = parse_url( get_option( 'home' ) );
$same_host = isset( $parsed_home['host'] ) && strtolower( $parsed_home['host'] ) === strtolower( $parsed_url['host'] );
$host = trim( $parsed_url['host'], '.' );
if ( ! $same_host ) {
if ( preg_match( '#^(([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)\.){3}([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)$#', $host ) ) {
$ip = $host;
} else {
$ip = gethostbyname( $host );
if ( $ip === $host ) { // Error condition for gethostbyname().
return false;
}
}
if ( $ip ) {
$parts = array_map( 'intval', explode( '.', $ip ) );
if ( 127 === $parts[0] || 10 === $parts[0] || 0 === $parts[0]
|| ( 172 === $parts[0] && 16 <= $parts[1] && 31 >= $parts[1] )
|| ( 192 === $parts[0] && 168 === $parts[1] )
) {
// If host appears local, reject unless specifically allowed.
/**
* Checks if HTTP request is external or not.
*
* Allows to change and allow external requests for the HTTP request.
*
* @since 3.6.0
*
* @param bool $external Whether HTTP request is external or not.
* @param string $host Host name of the requested URL.
* @param string $url Requested URL.
*/
if ( ! apply_filters( 'http_request_host_is_external', false, $host, $url ) ) {
return false;
}
}
}
}
if ( empty( $parsed_url['port'] ) ) {
return $url;
}
$port = $parsed_url['port'];
/**
* Controls the list of ports considered safe in HTTP API.
*
* Allows to change and allow external requests for the HTTP request.
*
* @since 5.9.0
*
* @param int[] $allowed_ports Array of integers for valid ports.
* @param string $host Host name of the requested URL.
* @param string $url Requested URL.
*/
$allowed_ports = apply_filters( 'http_allowed_safe_ports', array( 80, 443, 8080 ), $host, $url );
if ( is_array( $allowed_ports ) && in_array( $port, $allowed_ports, true ) ) {
return $url;
}
if ( $parsed_home && $same_host && isset( $parsed_home['port'] ) && $parsed_home['port'] === $port ) {
return $url;
}
return false;
}
/**
* Marks allowed redirect hosts safe for HTTP requests as well.
*
* Attached to the {@see 'http_request_host_is_external'} filter.
*
* @since 3.6.0
*
* @param bool $is_external
* @param string $host
* @return bool
*/
function allowed_http_request_hosts( $is_external, $host ) {
if ( ! $is_external && wp_validate_redirect( 'http://' . $host ) ) {
$is_external = true;
}
return $is_external;
}
/**
* Adds any domain in a multisite installation for safe HTTP requests to the
* allowed list.
*
* Attached to the {@see 'http_request_host_is_external'} filter.
*
* @since 3.6.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param bool $is_external
* @param string $host
* @return bool
*/
function ms_allowed_http_request_hosts( $is_external, $host ) {
global $wpdb;
static $queried = array();
if ( $is_external ) {
return $is_external;
}
if ( get_network()->domain === $host ) {
return true;
}
if ( isset( $queried[ $host ] ) ) {
return $queried[ $host ];
}
$queried[ $host ] = (bool) $wpdb->get_var( $wpdb->prepare( "SELECT domain FROM $wpdb->blogs WHERE domain = %s LIMIT 1", $host ) );
return $queried[ $host ];
}
/**
* A wrapper for PHP's parse_url() function that handles consistency in the return values
* across PHP versions.
*
* Across various PHP versions, schemeless URLs containing a ":" in the query
* are being handled inconsistently. This function works around those differences.
*
* @since 4.4.0
* @since 4.7.0 The `$component` parameter was added for parity with PHP's `parse_url()`.
*
* @link https://www.php.net/manual/en/function.parse-url.php
*
* @param string $url The URL to parse.
* @param int $component The specific component to retrieve. Use one of the PHP
* predefined constants to specify which one.
* Defaults to -1 (= return all parts as an array).
* @return mixed False on parse failure; Array of URL components on success;
* When a specific component has been requested: null if the component
* doesn't exist in the given URL; a string or - in the case of
* PHP_URL_PORT - integer when it does. See parse_url()'s return values.
*/
function wp_parse_url( $url, $component = -1 ) {
$to_unset = array();
$url = (string) $url;
if ( str_starts_with( $url, '//' ) ) {
$to_unset[] = 'scheme';
$url = 'placeholder:' . $url;
} elseif ( str_starts_with( $url, '/' ) ) {
$to_unset[] = 'scheme';
$to_unset[] = 'host';
$url = 'placeholder://placeholder' . $url;
}
$parts = parse_url( $url );
if ( false === $parts ) {
// Parsing failure.
return $parts;
}
// Remove the placeholder values.
foreach ( $to_unset as $key ) {
unset( $parts[ $key ] );
}
return _get_component_from_parsed_url_array( $parts, $component );
}
/**
* Retrieves a specific component from a parsed URL array.
*
* @internal
*
* @since 4.7.0
* @access private
*
* @link https://www.php.net/manual/en/function.parse-url.php
*
* @param array|false $url_parts The parsed URL. Can be false if the URL failed to parse.
* @param int $component The specific component to retrieve. Use one of the PHP
* predefined constants to specify which one.
* Defaults to -1 (= return all parts as an array).
* @return mixed False on parse failure; Array of URL components on success;
* When a specific component has been requested: null if the component
* doesn't exist in the given URL; a string or - in the case of
* PHP_URL_PORT - integer when it does. See parse_url()'s return values.
*/
function _get_component_from_parsed_url_array( $url_parts, $component = -1 ) {
if ( -1 === $component ) {
return $url_parts;
}
$key = _wp_translate_php_url_constant_to_key( $component );
if ( false !== $key && is_array( $url_parts ) && isset( $url_parts[ $key ] ) ) {
return $url_parts[ $key ];
} else {
return null;
}
}
/**
* Translates a PHP_URL_* constant to the named array keys PHP uses.
*
* @internal
*
* @since 4.7.0
* @access private
*
* @link https://www.php.net/manual/en/url.constants.php
*
* @param int $constant PHP_URL_* constant.
* @return string|false The named key or false.
*/
function _wp_translate_php_url_constant_to_key( $constant ) {
$translation = array(
PHP_URL_SCHEME => 'scheme',
PHP_URL_HOST => 'host',
PHP_URL_PORT => 'port',
PHP_URL_USER => 'user',
PHP_URL_PASS => 'pass',
PHP_URL_PATH => 'path',
PHP_URL_QUERY => 'query',
PHP_URL_FRAGMENT => 'fragment',
);
if ( isset( $translation[ $constant ] ) ) {
return $translation[ $constant ];
} else {
return false;
}
}