Gecko [ dallasfobana2023.variationbd.com ]

Name	Size	Permission
ID3	[ DIR ]	drwxr-xr-x
IXR	[ DIR ]	drwxr-xr-x
PHPMailer	[ DIR ]	drwxr-xr-x
Requests	[ DIR ]	drwxr-xr-x
SimplePie	[ DIR ]	drwxr-xr-x
Text	[ DIR ]	drwxr-xr-x
css	[ DIR ]	drwxr-xr-x
customize	[ DIR ]	drwxr-xr-x
fonts	[ DIR ]	drwxr-xr-x
images	[ DIR ]	drwxr-xr-x
js	[ DIR ]	drwxr-xr-x
pomo	[ DIR ]	drwxr-xr-x
random_compat	[ DIR ]	drwxr-xr-x
rest-api	[ DIR ]	drwxr-xr-x
theme-compat	[ DIR ]	drwxr-xr-x
widgets	[ DIR ]	drwxr-xr-x
admin-bar.php	29.03 KB	-rw-r--r--
atomlib.php	11.56 KB	-rw-r--r--
author-template.php	16.22 KB	-rw-r--r--
blocks.php	12.43 KB	-rw-r--r--
bookmark-template.php	11.64 KB	-rw-r--r--
bookmark.php	13.55 KB	-rw-r--r--
bootstrap.php	4.11 KB	-rw-r--r--
cache.php	21.35 KB	-rw-r--r--
canonical.php	27.83 KB	-rw-r--r--
capabilities.php	28.84 KB	-rw-r--r--
category-template.php	50.8 KB	-rw-r--r--
category.php	12.41 KB	-rw-r--r--
class-IXR.php	2.51 KB	-rw-r--r--
class-feed.php	523 B	-rw-r--r--
class-http.php	36.22 KB	-rw-r--r--
class-json.php	39.53 KB	-rw-r--r--
class-oembed.php	30.73 KB	-rw-r--r--
class-phpass.php	7.15 KB	-rw-r--r--
class-phpmailer.php	668 B	-rw-r--r--
class-pop3.php	20.43 KB	-rw-r--r--
class-requests.php	29.09 KB	-rw-r--r--
class-simplepie.php	87.17 KB	-rw-r--r--
class-smtp.php	461 B	-rw-r--r--
class-walker-category-dropdown...	2.07 KB	-rw-r--r--
class-walker-category.php	6.62 KB	-rw-r--r--
class-walker-comment.php	13.33 KB	-rw-r--r--
class-walker-nav-menu.php	8.38 KB	-rw-r--r--
class-walker-page-dropdown.php	2.24 KB	-rw-r--r--
class-walker-page.php	6.78 KB	-rw-r--r--
class-wp-admin-bar.php	16.08 KB	-rw-r--r--
class-wp-ajax-response.php	5.01 KB	-rw-r--r--
class-wp-block-parser.php	14.86 KB	-rw-r--r--
class-wp-block-type-registry.p...	4.63 KB	-rw-r--r--
class-wp-block-type.php	4.7 KB	-rw-r--r--
class-wp-comment-query.php	42.21 KB	-rw-r--r--
class-wp-comment.php	8.75 KB	-rw-r--r--
class-wp-customize-control.php	24.49 KB	-rw-r--r--
class-wp-customize-manager.php	195.47 KB	-rw-r--r--
class-wp-customize-nav-menus.p...	53.08 KB	-rw-r--r--
class-wp-customize-panel.php	9.42 KB	-rw-r--r--
class-wp-customize-section.php	9.99 KB	-rw-r--r--
class-wp-customize-setting.php	27.59 KB	-rw-r--r--
class-wp-dependency.php	2.28 KB	-rw-r--r--
class-wp-editor.php	66.27 KB	-rw-r--r--
class-wp-embed.php	14.38 KB	-rw-r--r--
class-wp-error.php	4.81 KB	-rw-r--r--
class-wp-feed-cache-transient....	2.5 KB	-rw-r--r--
class-wp-feed-cache.php	749 B	-rw-r--r--
class-wp-hook.php	13.77 KB	-rw-r--r--
class-wp-http-cookie.php	6.44 KB	-rw-r--r--
class-wp-http-curl.php	11.64 KB	-rw-r--r--
class-wp-http-encoding.php	6.35 KB	-rw-r--r--
class-wp-http-ixr-client.php	3.25 KB	-rw-r--r--
class-wp-http-proxy.php	5.92 KB	-rw-r--r--
class-wp-http-requests-hooks.p...	1.83 KB	-rw-r--r--
class-wp-http-requests-respons...	4.19 KB	-rw-r--r--
class-wp-http-response.php	2.8 KB	-rw-r--r--
class-wp-http-streams.php	15.02 KB	-rw-r--r--
class-wp-image-editor-gd.php	13.18 KB	-rw-r--r--
class-wp-image-editor-imagick....	21.27 KB	-rw-r--r--
class-wp-image-editor.php	11.49 KB	-rw-r--r--
class-wp-list-util.php	6.25 KB	-rw-r--r--
class-wp-locale-switcher.php	4.91 KB	-rw-r--r--
class-wp-locale.php	14.26 KB	-rw-r--r--
class-wp-matchesmapregex.php	1.76 KB	-rw-r--r--
class-wp-meta-query.php	22.86 KB	-rw-r--r--
class-wp-metadata-lazyloader.p...	5.26 KB	-rw-r--r--
class-wp-network-query.php	16.79 KB	-rw-r--r--
class-wp-network.php	11.93 KB	-rw-r--r--
class-wp-oembed-controller.php	5.88 KB	-rw-r--r--
class-wp-post-type.php	17.81 KB	-rw-r--r--
class-wp-post.php	6.28 KB	-rw-r--r--
class-wp-query.php	127.67 KB	-rw-r--r--
class-wp-rewrite.php	58.42 KB	-rw-r--r--
class-wp-role.php	2.6 KB	-rw-r--r--
class-wp-roles.php	8.13 KB	-rw-r--r--
class-wp-session-tokens.php	7.25 KB	-rw-r--r--
class-wp-simplepie-file.php	2.27 KB	-rw-r--r--
class-wp-simplepie-sanitize-ks...	1.73 KB	-rw-r--r--
class-wp-site-query.php	26.78 KB	-rw-r--r--
class-wp-site.php	7.13 KB	-rw-r--r--
class-wp-tax-query.php	18.81 KB	-rw-r--r--
class-wp-taxonomy.php	10.41 KB	-rw-r--r--
class-wp-term-query.php	33.84 KB	-rw-r--r--
class-wp-term.php	5.14 KB	-rw-r--r--
class-wp-text-diff-renderer-in...	716 B	-rw-r--r--
class-wp-text-diff-renderer-ta...	16.06 KB	-rw-r--r--
class-wp-theme.php	48.09 KB	-rw-r--r--
class-wp-user-meta-session-tok...	2.92 KB	-rw-r--r--
class-wp-user-query.php	30.49 KB	-rw-r--r--
class-wp-user.php	20.91 KB	-rw-r--r--
class-wp-walker.php	12.39 KB	-rw-r--r--
class-wp-widget-factory.php	3.69 KB	-rw-r--r--
class-wp-widget.php	17.41 KB	-rw-r--r--
class-wp-xmlrpc-server.php	202.08 KB	-rw-r--r--
class-wp.php	24.18 KB	-rw-r--r--
class.wp-dependencies.php	11.24 KB	-rw-r--r--
class.wp-scripts.php	16.79 KB	-rw-r--r--
class.wp-styles.php	9.61 KB	-rw-r--r--
comment-template.php	87.64 KB	-rw-r--r--
comment.php	111.72 KB	-rw-r--r--
compat.php	15.99 KB	-rw-r--r--
cron.php	30.82 KB	-rw-r--r--
date.php	34.34 KB	-rw-r--r--
default-constants.php	9.61 KB	-rw-r--r--
default-filters.php	24.68 KB	-rw-r--r--
default-widgets.php	2.13 KB	-rw-r--r--
embed.php	44.04 KB	-rw-r--r--
feed-atom-comments.php	5.33 KB	-rw-r--r--
feed-atom.php	3.09 KB	-rw-r--r--
feed-rdf.php	2.67 KB	-rw-r--r--
feed-rss.php	1.25 KB	-rw-r--r--
feed-rss2-comments.php	4.09 KB	-rw-r--r--
feed-rss2.php	3.77 KB	-rw-r--r--
feed.php	19.29 KB	-rw-r--r--
formatting.php	277.86 KB	-rw-r--r--
functions.php	207.2 KB	-rw-r--r--
functions.wp-scripts.php	12.53 KB	-rw-r--r--
functions.wp-styles.php	8.03 KB	-rw-r--r--
general-template.php	138.46 KB	-rw-r--r--
http.php	21.9 KB	-rw-r--r--
kses.php	55.74 KB	-rw-r--r--
l10n.php	50.58 KB	-rw-r--r--
link-template.php	135.3 KB	-rw-r--r--
load.php	36.4 KB	-rw-r--r--
media-template.php	46.33 KB	-rw-r--r--
media.php	141.33 KB	-rw-r--r--
meta.php	44.98 KB	-rw-r--r--
mime.php	39.54 KB	-rw-r--r--
nav-menu-template.php	21.2 KB	-rw-r--r--
nav-menu.php	39.57 KB	-rw-r--r--
open_basedir.php	21 B	-rw-r--r--
option.php	67.91 KB	-rw-r--r--
pluggable.php	97.52 KB	-rw-r--r--
plugin.php	31.37 KB	-rw-r--r--
post-formats.php	6.86 KB	-rw-r--r--
post-template.php	60.07 KB	-rw-r--r--
post-thumbnail-template.php	8.75 KB	-rw-r--r--
post.php	227.37 KB	-rw-r--r--
query.php	31.24 KB	-rw-r--r--
rest-api.php	40.67 KB	-rw-r--r--
revision.php	21.08 KB	-rw-r--r--
rewrite.php	17.27 KB	-rw-r--r--
rss.php	22.66 KB	-rw-r--r--
script-loader.php	98.75 KB	-rw-r--r--
shortcodes.php	20.25 KB	-rw-r--r--
sitepad_functions.php	19.26 KB	-rw-r--r--
sitepad_functions2.php	21.99 KB	-rw-r--r--
spl-autoload-compat.php	2.51 KB	-rw-r--r--
taxonomy.php	152.95 KB	-rw-r--r--
template-loader.php	2.55 KB	-rw-r--r--
template.php	19.77 KB	-rw-r--r--
theme.php	99.09 KB	-rw-r--r--
update.php	24.81 KB	-rw-r--r--
user.php	120.69 KB	-rw-r--r--
vars.php	5.59 KB	-rw-r--r--
version.php	2.03 KB	-rw-r--r--
widgets.php	55.82 KB	-rw-r--r--
wlwmanifest.xml	1.03 KB	-rw-r--r--
wp-db.php	99.29 KB	-rw-r--r--
wp-diff.php	662 B	-rw-r--r--

Code Editor : http.php

<?php
/**
 * 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
 *
 * @staticvar WP_Http $http
 *
 * @return WP_Http HTTP Transport object.
 */
function _wp_http_get_object() {
	static $http = null;

if ( is_null( $http ) ) {
		$http = new WP_Http();
	}
	return $http;
}

/**
 * Retrieve 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 is validated to avoid redirection and request forgery attacks.
 *
 * @since 3.6.0
 *
 * @see wp_remote_request() For more information on the response array format.
 * @see WP_Http::request() For default arguments information.
 *
 * @param string $url  Site URL to retrieve.
 * @param array  $args Optional. Request arguments. Default empty array.
 * @return WP_Error|array The response or WP_Error on failure.
 */
function wp_safe_remote_request( $url, $args = array() ) {
	$args['reject_unsafe_urls'] = true;
	$http                       = _wp_http_get_object();
	return $http->request( $url, $args );
}

/**
 * Retrieve 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 is validated to avoid redirection and request forgery attacks.
 *
 * @since 3.6.0
 *
 * @see wp_remote_request() For more information on the response array format.
 * @see WP_Http::request() For default arguments information.
 *
 * @param string $url  Site URL to retrieve.
 * @param array  $args Optional. Request arguments. Default empty array.
 * @return WP_Error|array The response or WP_Error on failure.
 */
function wp_safe_remote_get( $url, $args = array() ) {
	$args['reject_unsafe_urls'] = true;
	$http                       = _wp_http_get_object();
	return $http->get( $url, $args );
}

/**
 * Retrieve 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 is validated to avoid redirection and request forgery attacks.
 *
 * @since 3.6.0
 *
 * @see wp_remote_request() For more information on the response array format.
 * @see WP_Http::request() For default arguments information.
 *
 * @param string $url  Site URL to retrieve.
 * @param array  $args Optional. Request arguments. Default empty array.
 * @return WP_Error|array The response or WP_Error on failure.
 */
function wp_safe_remote_post( $url, $args = array() ) {
	$args['reject_unsafe_urls'] = true;
	$http                       = _wp_http_get_object();
	return $http->post( $url, $args );
}

/**
 * Retrieve 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 is validated to avoid redirection and request forgery attacks.
 *
 * @since 3.6.0
 *
 * @see wp_remote_request() For more information on the response array format.
 * @see WP_Http::request() For default arguments information.
 *
 * @param string $url Site URL to retrieve.
 * @param array $args Optional. Request arguments. Default empty array.
 * @return WP_Error|array The response or WP_Error on failure.
 */
function wp_safe_remote_head( $url, $args = array() ) {
	$args['reject_unsafe_urls'] = true;
	$http                       = _wp_http_get_object();
	return $http->head( $url, $args );
}

/**
 * Retrieve the raw response from the HTTP request.
 *
 * The array structure is a little complex:
 *
 *     $res = array(
 *         'headers'  => array(),
 *         'response' => array(
 *             'code'    => int,
 *             'message' => string
 *         )
 *     );
 *
 * All of the headers in $res['headers'] are with the name as the key and the
 * value as the value. So to get the User-Agent, you would do the following.
 *
 *     $user_agent = $res['headers']['user-agent'];
 *
 * The body is the raw response content and can be retrieved from $res['body'].
 *
 * This function is called first to make the request and there are other API
 * functions to abstract out the above convoluted setup.
 *
 * Request method defaults for helper functions:
 *  - 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 additional information on default arguments.
 *
 * @param string $url  Site URL to retrieve.
 * @param array  $args Optional. Request arguments. Default empty array.
 * @return WP_Error|array The response or WP_Error on failure.
 */
function wp_remote_request( $url, $args = array() ) {
	$http = _wp_http_get_object();
	return $http->request( $url, $args );
}

/**
 * Retrieve the raw response from the HTTP request using the GET method.
 *
 * @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  Site URL to retrieve.
 * @param array  $args Optional. Request arguments. Default empty array.
 * @return WP_Error|array The response or WP_Error on failure.
 */
function wp_remote_get( $url, $args = array() ) {
	$http = _wp_http_get_object();
	return $http->get( $url, $args );
}

/**
 * Retrieve the raw response from the HTTP request using the POST method.
 *
 * @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  Site URL to retrieve.
 * @param array  $args Optional. Request arguments. Default empty array.
 * @return WP_Error|array The response or WP_Error on failure.
 */
function wp_remote_post( $url, $args = array() ) {
	$http = _wp_http_get_object();
	return $http->post( $url, $args );
}

/**
 * Retrieve the raw response from the HTTP request using the HEAD method.
 *
 * @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  Site URL to retrieve.
 * @param array  $args Optional. Request arguments. Default empty array.
 * @return WP_Error|array The response or WP_Error on failure.
 */
function wp_remote_head( $url, $args = array() ) {
	$http = _wp_http_get_object();
	return $http->head( $url, $args );
}

/**
 * Retrieve only the headers from the raw response.
 *
 * @since 2.7.0
 * @since 4.6.0 Return value changed from an array to an Requests_Utility_CaseInsensitiveDictionary instance.
 *
 * @see \Requests_Utility_CaseInsensitiveDictionary
 *
 * @param array $response HTTP response.
 * @return array|\Requests_Utility_CaseInsensitiveDictionary The headers of the response. 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'];
}

/**
 * Retrieve a single header by name from the raw response.
 *
 * @since 2.7.0
 *
 * @param array  $response
 * @param string $header Header name to retrieve value from.
 * @return string The header value. Empty string on 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 '';
}

/**
 * Retrieve only the response code from the raw response.
 *
 * Will return an empty array if incorrect parameter value is given.
 *
 * @since 2.7.0
 *
 * @param array $response HTTP response.
 * @return int|string The response code as an integer. Empty string on 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'];
}

/**
 * Retrieve only the response message from the raw response.
 *
 * Will return an empty array if incorrect parameter value is given.
 *
 * @since 2.7.0
 *
 * @param array $response HTTP response.
 * @return string The response message. Empty string on 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'];
}

/**
 * Retrieve only the body from the raw response.
 *
 * @since 2.7.0
 *
 * @param array $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'];
}

/**
 * Retrieve only the cookies from the raw response.
 *
 * @since 4.4.0
 *
 * @param array $response HTTP response.
 * @return array 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'];
}

/**
 * Retrieve a single cookie by name from the raw response.
 *
 * @since 4.4.0
 *
 * @param array  $response HTTP response.
 * @param string $name     The name of the cookie to retrieve.
 * @return WP_Http_Cookie|string The `WP_Http_Cookie` object. Empty string if the cookie isn't 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 '';
}

/**
 * Retrieve a single cookie's value by name from the raw response.
 *
 * @since 4.4.0
 *
 * @param array  $response HTTP response.
 * @param string $name     The name of the cookie to retrieve.
 * @return string The value of the cookie. Empty string if the cookie isn't present in the response.
 */
function wp_remote_retrieve_cookie_value( $response, $name ) {
	$cookie = wp_remote_retrieve_cookie( $response, $name );

if ( ! is_a( $cookie, '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 ) {
	$http = _wp_http_get_object();

$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 (bool) $http->_get_first_available_transport( $capabilities );
}

/**
 * Get 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'];
	}

/**
	 * Change 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 );
}

/**
 * Retrieve list of allowed HTTP origins.
 *
 * @since 3.4.0
 *
 * @return array 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'],
		)
	);

/**
	 * Change the origin types allowed for HTTP requests.
	 *
	 * @since 3.4.0
	 *
	 * @param array $allowed_origins {
	 *     Default allowed HTTP origins.
	 *     @type string Non-secure URL for admin origin.
	 *     @type string Secure URL for admin origin.
	 *     @type string Non-secure URL for home origin.
	 *     @type string 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 null|string $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() ) ) {
		$origin = '';
	}

/**
	 * Change 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 );
}

/**
 * Send 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;
}

/**
 * Validate a URL for safe use in the HTTP API.
 *
 * @since 3.5.2
 *
 * @param string $url
 * @return false|string URL or false on failure.
 */
function wp_http_validate_url( $url ) {
	$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' ) );

if ( isset( $parsed_home['host'] ) ) {
		$same_host = strtolower( $parsed_home['host'] ) === strtolower( $parsed_url['host'] );
	} else {
		$same_host = false;
	}

if ( ! $same_host ) {
		$host = trim( $parsed_url['host'], '.' );
		if ( preg_match( '#^(([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)\.){3}([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)$#', $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.
				/**
				 * Check if HTTP request is external or not.
				 *
				 * Allows to change and allow external requests for the HTTP request.
				 *
				 * @since 3.6.0
				 *
				 * @param bool   false Whether HTTP request is external or not.
				 * @param string $host IP of the requested host.
				 * @param string $url  URL of the requested host.
				 */
				if ( ! apply_filters( 'http_request_host_is_external', false, $host, $url ) ) {
					return false;
				}
			}
		}
	}

if ( empty( $parsed_url['port'] ) ) {
		return $url;
	}

$port = $parsed_url['port'];
	if ( 80 === $port || 443 === $port || 8080 === $port ) {
		return $url;
	}

if ( $parsed_home && $same_host && isset( $parsed_home['port'] ) && $parsed_home['port'] === $port ) {
		return $url;
	}

return false;
}

/**
 * Whitelists allowed redirect hosts for safe 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;
}

/**
 * Whitelists any domain in a multisite installation for safe HTTP requests.
 *
 * Attached to the {@see 'http_request_host_is_external'} filter.
 *
 * @since 3.6.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 * @staticvar array $queried
 *
 * @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 ( $host === get_network()->domain ) {
		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.
 *
 * PHP 5.4.7 expanded parse_url()'s ability to handle non-absolute url's, including
 * schemeless and relative url's with :// in the path. This function works around
 * those limitations providing a standard output on PHP 5.2~5.4+.
 *
 * Secondly, across various PHP versions, schemeless URLs starting containing a ":"
 * in the query are being handled inconsistently. This function works around those
 * differences as well.
 *
 * Error suppression is used as prior to PHP 5.3.3, an E_WARNING would be generated
 * when URL parsing failed.
 *
 * @since 4.4.0
 * @since 4.7.0 The `$component` parameter was added for parity with PHP's `parse_url()`.
 *
 * @link https://secure.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      = strval( $url );

if ( '//' === substr( $url, 0, 2 ) ) {
		$to_unset[] = 'scheme';
		$url        = 'placeholder:' . $url;
	} elseif ( '/' === substr( $url, 0, 1 ) ) {
		$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 );
}

/**
 * Retrieve a specific component from a parsed URL array.
 *
 * @internal
 *
 * @since 4.7.0
 * @access private
 *
 * @link https://secure.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;
	}
}

/**
 * Translate a PHP_URL_* constant to the named array keys PHP uses.
 *
 * @internal
 *
 * @since 4.7.0
 * @access private
 *
 * @link https://secure.php.net/manual/en/url.constants.php
 *
 * @param int $constant PHP_URL_* constant.
 * @return string|bool 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;
	}
}

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