<?php


// Don't load directly.
if ( ! defined( 'ABSPATH' ) ) {
	die( '-1' );
}

if ( ! class_exists( 'WpOrg\Requests\Autoload' ) ) {
	require ABSPATH . WPINC . '/Requests/src/Autoload.php';

	WpOrg\Requests\Autoload::register();
	WpOrg\Requests\Requests::set_certificate_path( ABSPATH . WPINC . '/certificates/ca-bundle.crt' );
}


#[AllowDynamicProperties]
class WP_Http {

	// Aliases for HTTP response codes.
	const HTTP_CONTINUE       = 100;
	const SWITCHING_PROTOCOLS = 101;
	const PROCESSING          = 102;
	const EARLY_HINTS         = 103;

	const OK                            = 200;
	const CREATED                       = 201;
	const ACCEPTED                      = 202;
	const NON_AUTHORITATIVE_INFORMATION = 203;
	const NO_CONTENT                    = 204;
	const RESET_CONTENT                 = 205;
	const PARTIAL_CONTENT               = 206;
	const MULTI_STATUS                  = 207;
	const IM_USED                       = 226;

	const MULTIPLE_CHOICES   = 300;
	const MOVED_PERMANENTLY  = 301;
	const FOUND              = 302;
	const SEE_OTHER          = 303;
	const NOT_MODIFIED       = 304;
	const USE_PROXY          = 305;
	const RESERVED           = 306;
	const TEMPORARY_REDIRECT = 307;
	const PERMANENT_REDIRECT = 308;

	const BAD_REQUEST                     = 400;
	const UNAUTHORIZED                    = 401;
	const PAYMENT_REQUIRED                = 402;
	const FORBIDDEN                       = 403;
	const NOT_FOUND                       = 404;
	const METHOD_NOT_ALLOWED              = 405;
	const NOT_ACCEPTABLE                  = 406;
	const PROXY_AUTHENTICATION_REQUIRED   = 407;
	const REQUEST_TIMEOUT                 = 408;
	const CONFLICT                        = 409;
	const GONE                            = 410;
	const LENGTH_REQUIRED                 = 411;
	const PRECONDITION_FAILED             = 412;
	const REQUEST_ENTITY_TOO_LARGE        = 413;
	const REQUEST_URI_TOO_LONG            = 414;
	const UNSUPPORTED_MEDIA_TYPE          = 415;
	const REQUESTED_RANGE_NOT_SATISFIABLE = 416;
	const EXPECTATION_FAILED              = 417;
	const IM_A_TEAPOT                     = 418;
	const MISDIRECTED_REQUEST             = 421;
	const UNPROCESSABLE_ENTITY            = 422;
	const LOCKED                          = 423;
	const FAILED_DEPENDENCY               = 424;
	const TOO_EARLY                       = 425;
	const UPGRADE_REQUIRED                = 426;
	const PRECONDITION_REQUIRED           = 428;
	const TOO_MANY_REQUESTS               = 429;
	const REQUEST_HEADER_FIELDS_TOO_LARGE = 431;
	const UNAVAILABLE_FOR_LEGAL_REASONS   = 451;

	const INTERNAL_SERVER_ERROR           = 500;
	const NOT_IMPLEMENTED                 = 501;
	const BAD_GATEWAY                     = 502;
	const SERVICE_UNAVAILABLE             = 503;
	const GATEWAY_TIMEOUT                 = 504;
	const HTTP_VERSION_NOT_SUPPORTED      = 505;
	const VARIANT_ALSO_NEGOTIATES         = 506;
	const INSUFFICIENT_STORAGE            = 507;
	const NOT_EXTENDED                    = 510;
	const NETWORK_AUTHENTICATION_REQUIRED = 511;

	
	public function request( $url, $args = array() ) {
		$defaults = array(
			'method'              => 'GET',
			
			'timeout'             => apply_filters( 'http_request_timeout', 5, $url ),
			
			'redirection'         => apply_filters( 'http_request_redirection_count', 5, $url ),
			
			'httpversion'         => apply_filters( 'http_request_version', '1.0', $url ),
			
			'user-agent'          => apply_filters( 'http_headers_useragent', 'WordPress/' . get_bloginfo( 'version' ) . '; ' . get_bloginfo( 'url' ), $url ),
			
			'reject_unsafe_urls'  => apply_filters( 'http_request_reject_unsafe_urls', false, $url ),
			'blocking'            => true,
			'headers'             => array(),
			'cookies'             => array(),
			'body'                => null,
			'compress'            => false,
			'decompress'          => true,
			'sslverify'           => true,
			'sslcertificates'     => ABSPATH . WPINC . '/certificates/ca-bundle.crt',
			'stream'              => false,
			'filename'            => null,
			'limit_response_size' => null,
		);

		// Pre-parse for the HEAD checks.
		$args = wp_parse_args( $args );

		// By default, HEAD requests do not cause redirections.
		if ( isset( $args['method'] ) && 'HEAD' === $args['method'] ) {
			$defaults['redirection'] = 0;
		}

		$parsed_args = wp_parse_args( $args, $defaults );
		
		$parsed_args = apply_filters( 'http_request_args', $parsed_args, $url );

		// The transports decrement this, store a copy of the original value for loop purposes.
		if ( ! isset( $parsed_args['_redirection'] ) ) {
			$parsed_args['_redirection'] = $parsed_args['redirection'];
		}

		
		$pre = apply_filters( 'pre_http_request', false, $parsed_args, $url );

		if ( false !== $pre ) {
			return $pre;
		}

		if ( function_exists( 'wp_kses_bad_protocol' ) ) {
			if ( $parsed_args['reject_unsafe_urls'] ) {
				$url = wp_http_validate_url( $url );
			}
			if ( $url ) {
				$url = wp_kses_bad_protocol( $url, array( 'http', 'https', 'ssl' ) );
			}
		}

		$parsed_url = parse_url( $url );

		if ( empty( $url ) || empty( $parsed_url['scheme'] ) ) {
			$response = new WP_Error( 'http_request_failed', __( 'A valid URL was not provided.' ) );
			
			do_action( 'http_api_debug', $response, 'response', 'WpOrg\Requests\Requests', $parsed_args, $url );
			return $response;
		}

		if ( $this->block_request( $url ) ) {
			$response = new WP_Error( 'http_request_not_executed', __( 'User has blocked requests through HTTP.' ) );
			
			do_action( 'http_api_debug', $response, 'response', 'WpOrg\Requests\Requests', $parsed_args, $url );
			return $response;
		}

		// If we are streaming to a file but no filename was given drop it in the WP temp dir
		// and pick its name using the basename of the $url.
		if ( $parsed_args['stream'] ) {
			if ( empty( $parsed_args['filename'] ) ) {
				$parsed_args['filename'] = get_temp_dir() . basename( $url );
			}

			// Force some settings if we are streaming to a file and check for existence
			// and perms of destination directory.
			$parsed_args['blocking'] = true;
			if ( ! wp_is_writable( dirname( $parsed_args['filename'] ) ) ) {
				$response = new WP_Error( 'http_request_failed', __( 'Destination directory for file streaming does not exist or is not writable.' ) );
				
				do_action( 'http_api_debug', $response, 'response', 'WpOrg\Requests\Requests', $parsed_args, $url );
				return $response;
			}
		}

		if ( is_null( $parsed_args['headers'] ) ) {
			$parsed_args['headers'] = array();
		}

		// WP allows passing in headers as a string, weirdly.
		if ( ! is_array( $parsed_args['headers'] ) ) {
			$processed_headers      = WP_Http::processHeaders( $parsed_args['headers'] );
			$parsed_args['headers'] = $processed_headers['headers'];
		}

		// Setup arguments.
		$headers = $parsed_args['headers'];
		$data    = $parsed_args['body'];
		$type    = $parsed_args['method'];
		$options = array(
			'timeout'   => $parsed_args['timeout'],
			'useragent' => $parsed_args['user-agent'],
			'blocking'  => $parsed_args['blocking'],
			'hooks'     => new WP_HTTP_Requests_Hooks( $url, $parsed_args ),
		);

		// Ensure redirects follow browser behavior.
		$options['hooks']->register( 'requests.before_redirect', array( static::class, 'browser_redirect_compatibility' ) );

		// Validate redirected URLs.
		if ( function_exists( 'wp_kses_bad_protocol' ) && $parsed_args['reject_unsafe_urls'] ) {
			$options['hooks']->register( 'requests.before_redirect', array( static::class, 'validate_redirects' ) );
		}

		if ( $parsed_args['stream'] ) {
			$options['filename'] = $parsed_args['filename'];
		}
		if ( empty( $parsed_args['redirection'] ) ) {
			$options['follow_redirects'] = false;
		} else {
			$options['redirects'] = $parsed_args['redirection'];
		}

		// Use byte limit, if we can.
		if ( isset( $parsed_args['limit_response_size'] ) ) {
			$options['max_bytes'] = $parsed_args['limit_response_size'];
		}

		// If we've got cookies, use and convert them to WpOrg\Requests\Cookie.
		if ( ! empty( $parsed_args['cookies'] ) ) {
			$options['cookies'] = WP_Http::normalize_cookies( $parsed_args['cookies'] );
		}

		// SSL certificate handling.
		if ( ! $parsed_args['sslverify'] ) {
			$options['verify']     = false;
			$options['verifyname'] = false;
		} else {
			$options['verify'] = $parsed_args['sslcertificates'];
		}

		// All non-GET/HEAD requests should put the arguments in the form body.
		if ( 'HEAD' !== $type && 'GET' !== $type ) {
			$options['data_format'] = 'body';
		}

		
		$options['verify'] = apply_filters( 'https_ssl_verify', $options['verify'], $url );

		// Check for proxies.
		$proxy = new WP_HTTP_Proxy();
		if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) {
			$options['proxy'] = new WpOrg\Requests\Proxy\Http( $proxy->host() . ':' . $proxy->port() );

			if ( $proxy->use_authentication() ) {
				$options['proxy']->use_authentication = true;
				$options['proxy']->user               = $proxy->username();
				$options['proxy']->pass               = $proxy->password();
			}
		}

		// Avoid issues where mbstring.func_overload is enabled.
		mbstring_binary_safe_encoding();

		try {
			$requests_response = WpOrg\Requests\Requests::request( $url, $headers, $data, $type, $options );

			// Convert the response into an array.
			$http_response = new WP_HTTP_Requests_Response( $requests_response, $parsed_args['filename'] );
			$response      = $http_response->to_array();

			// Add the original object to the array.
			$response['http_response'] = $http_response;
		} catch ( WpOrg\Requests\Exception $e ) {
			$response = new WP_Error( 'http_request_failed', $e->getMessage() );
		}

		reset_mbstring_encoding();

		
		do_action( 'http_api_debug', $response, 'response', 'WpOrg\Requests\Requests', $parsed_args, $url );
		if ( is_wp_error( $response ) ) {
			return $response;
		}

		if ( ! $parsed_args['blocking'] ) {
			return array(
				'headers'       => array(),
				'body'          => '',
				'response'      => array(
					'code'    => false,
					'message' => false,
				),
				'cookies'       => array(),
				'http_response' => null,
			);
		}

		
		return apply_filters( 'http_response', $response, $parsed_args, $url );
	}

	
	public static function normalize_cookies( $cookies ) {
		$cookie_jar = new WpOrg\Requests\Cookie\Jar();

		foreach ( $cookies as $name => $value ) {
			if ( $value instanceof WP_Http_Cookie ) {
				$attributes                 = array_filter(
					$value->get_attributes(),
					static function ( $attr ) {
						return null !== $attr;
					}
				);
				$cookie_jar[ $value->name ] = new WpOrg\Requests\Cookie( (string) $value->name, $value->value, $attributes, array( 'host-only' => $value->host_only ) );
			} elseif ( is_scalar( $value ) ) {
				$cookie_jar[ $name ] = new WpOrg\Requests\Cookie( (string) $name, (string) $value );
			}
		}

		return $cookie_jar;
	}

	
	public static function browser_redirect_compatibility( $location, $headers, $data, &$options, $original ) {
		// Browser compatibility.
		if ( 302 === $original->status_code ) {
			$options['type'] = WpOrg\Requests\Requests::GET;
		}
	}

	
	public static function validate_redirects( $location ) {
		if ( ! wp_http_validate_url( $location ) ) {
			throw new WpOrg\Requests\Exception( __( 'A valid URL was not provided.' ), 'wp_http.redirect_failed_validation' );
		}
	}

	
	public function _get_first_available_transport( $args, $url = null ) {
		$transports = array( 'curl', 'streams' );

		
		$request_order = apply_filters_deprecated( 'http_api_transports', array( $transports, $args, $url ), '6.4.0' );

		// Loop over each transport on each HTTP request looking for one which will serve this request's needs.
		foreach ( $request_order as $transport ) {
			if ( in_array( $transport, $transports, true ) ) {
				$transport = ucfirst( $transport );
			}
			$class = 'WP_Http_' . $transport;

			// Check to see if this transport is a possibility, calls the transport statically.
			if ( ! call_user_func( array( $class, 'test' ), $args, $url ) ) {
				continue;
			}

			return $class;
		}

		return false;
	}

	
	private function _dispatch_request( $url, $args ) {
		static $transports = array();

		$class = $this->_get_first_available_transport( $args, $url );
		if ( ! $class ) {
			return new WP_Error( 'http_failure', __( 'There are no HTTP transports available which can complete the requested request.' ) );
		}

		// Transport claims to support request, instantiate it and give it a whirl.
		if ( empty( $transports[ $class ] ) ) {
			$transports[ $class ] = new $class();
		}

		$response = $transports[ $class ]->request( $url, $args );

		
		do_action( 'http_api_debug', $response, 'response', $class, $args, $url );

		if ( is_wp_error( $response ) ) {
			return $response;
		}

		
		return apply_filters( 'http_response', $response, $args, $url );
	}

	
	public function post( $url, $args = array() ) {
		$defaults    = array( 'method' => 'POST' );
		$parsed_args = wp_parse_args( $args, $defaults );
		return $this->request( $url, $parsed_args );
	}

	
	public function get( $url, $args = array() ) {
		$defaults    = array( 'method' => 'GET' );
		$parsed_args = wp_parse_args( $args, $defaults );
		return $this->request( $url, $parsed_args );
	}

	
	public function head( $url, $args = array() ) {
		$defaults    = array( 'method' => 'HEAD' );
		$parsed_args = wp_parse_args( $args, $defaults );
		return $this->request( $url, $parsed_args );
	}

	
	public static function processResponse( $response ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
		$response = explode( "\r\n\r\n", $response, 2 );

		return array(
			'headers' => $response[0],
			'body'    => isset( $response[1] ) ? $response[1] : '',
		);
	}

	
	public static function processHeaders( $headers, $url = '' ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
		// Split headers, one per array element.
		if ( is_string( $headers ) ) {
			// Tolerate line terminator: CRLF = LF (RFC 2616 19.3).
			$headers = str_replace( "\r\n", "\n", $headers );
			/*
			 * Unfold folded header fields. LWS = [CRLF] 1*( SP | HT ) <US-ASCII SP, space (32)>,
			 * <US-ASCII HT, horizontal-tab (9)> (RFC 2616 2.2).
			 */
			$headers = preg_replace( '/\n[ \t]/', ' ', $headers );
			// Create the headers array.
			$headers = explode( "\n", $headers );
		}

		$response = array(
			'code'    => 0,
			'message' => '',
		);

		/*
		 * If a redirection has taken place, The headers for each page request may have been passed.
		 * In this case, determine the final HTTP header and parse from there.
		 */
		for ( $i = count( $headers ) - 1; $i >= 0; $i-- ) {
			if ( ! empty( $headers[ $i ] ) && ! str_contains( $headers[ $i ], ':' ) ) {
				$headers = array_splice( $headers, $i );
				break;
			}
		}

		$cookies    = array();
		$newheaders = array();
		foreach ( (array) $headers as $tempheader ) {
			if ( empty( $tempheader ) ) {
				continue;
			}

			if ( ! str_contains( $tempheader, ':' ) ) {
				$stack   = explode( ' ', $tempheader, 3 );
				$stack[] = '';
				list( , $response['code'], $response['message']) = $stack;
				continue;
			}

			list($key, $value) = explode( ':', $tempheader, 2 );

			$key   = strtolower( $key );
			$value = trim( $value );

			if ( isset( $newheaders[ $key ] ) ) {
				if ( ! is_array( $newheaders[ $key ] ) ) {
					$newheaders[ $key ] = array( $newheaders[ $key ] );
				}
				$newheaders[ $key ][] = $value;
			} else {
				$newheaders[ $key ] = $value;
			}
			if ( 'set-cookie' === $key ) {
				$cookies[] = new WP_Http_Cookie( $value, $url );
			}
		}

		// Cast the Response Code to an int.
		$response['code'] = (int) $response['code'];

		return array(
			'response' => $response,
			'headers'  => $newheaders,
			'cookies'  => $cookies,
		);
	}

	
	public static function buildCookieHeader( &$r ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
		if ( ! empty( $r['cookies'] ) ) {
			// Upgrade any name => value cookie pairs to WP_HTTP_Cookie instances.
			foreach ( $r['cookies'] as $name => $value ) {
				if ( ! is_object( $value ) ) {
					$r['cookies'][ $name ] = new WP_Http_Cookie(
						array(
							'name'  => $name,
							'value' => $value,
						)
					);
				}
			}

			$cookies_header = '';
			foreach ( (array) $r['cookies'] as $cookie ) {
				$cookies_header .= $cookie->getHeaderValue() . '; ';
			}

			$cookies_header         = substr( $cookies_header, 0, -2 );
			$r['headers']['cookie'] = $cookies_header;
		}
	}

	
	public static function chunkTransferDecode( $body ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
		// The body is not chunked encoded or is malformed.
		if ( ! preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', trim( $body ) ) ) {
			return $body;
		}

		$parsed_body = '';

		// We'll be altering $body, so need a backup in case of error.
		$body_original = $body;

		while ( true ) {
			$has_chunk = (bool) preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', $body, $match );
			if ( ! $has_chunk || empty( $match[1] ) ) {
				return $body_original;
			}

			$length       = hexdec( $match[1] );
			$chunk_length = strlen( $match[0] );

			// Parse out the chunk of data.
			$parsed_body .= substr( $body, $chunk_length, $length );

			// Remove the chunk from the raw data.
			$body = substr( $body, $length + $chunk_length );

			// End of the document.
			if ( '0' === trim( $body ) ) {
				return $parsed_body;
			}
		}
	}

	
	public function block_request( $uri ) {
		// We don't need to block requests, because nothing is blocked.
		if ( ! defined( 'WP_HTTP_BLOCK_EXTERNAL' ) || ! WP_HTTP_BLOCK_EXTERNAL ) {
			return false;
		}

		$check = parse_url( $uri );
		if ( ! $check ) {
			return true;
		}

		$home = parse_url( get_option( 'siteurl' ) );

		// Don't block requests back to ourselves by default.
		if ( 'localhost' === $check['host'] || ( isset( $home['host'] ) && $home['host'] === $check['host'] ) ) {
			
			return apply_filters( 'block_local_requests', false );
		}

		if ( ! defined( 'WP_ACCESSIBLE_HOSTS' ) ) {
			return true;
		}

		static $accessible_hosts = null;
		static $wildcard_regex   = array();
		if ( null === $accessible_hosts ) {
			$accessible_hosts = preg_split( '|,\s*|', WP_ACCESSIBLE_HOSTS );

			if ( str_contains( WP_ACCESSIBLE_HOSTS, '*' ) ) {
				$wildcard_regex = array();
				foreach ( $accessible_hosts as $host ) {
					$wildcard_regex[] = str_replace( '\*', '.+', preg_quote( $host, '/' ) );
				}
				$wildcard_regex = '/^(' . implode( '|', $wildcard_regex ) . ')$/i';
			}
		}

		if ( ! empty( $wildcard_regex ) ) {
			return ! preg_match( $wildcard_regex, $check['host'] );
		} else {
			return ! in_array( $check['host'], $accessible_hosts, true ); // Inverse logic, if it's in the array, then don't block it.
		}
	}

	
	protected static function parse_url( $url ) {
		_deprecated_function( __METHOD__, '4.4.0', 'wp_parse_url()' );
		return wp_parse_url( $url );
	}

	
	public static function make_absolute_url( $maybe_relative_path, $url ) {
		if ( empty( $url ) ) {
			return $maybe_relative_path;
		}

		$url_parts = wp_parse_url( $url );
		if ( ! $url_parts ) {
			return $maybe_relative_path;
		}

		$relative_url_parts = wp_parse_url( $maybe_relative_path );
		if ( ! $relative_url_parts ) {
			return $maybe_relative_path;
		}

		// Check for a scheme on the 'relative' URL.
		if ( ! empty( $relative_url_parts['scheme'] ) ) {
			return $maybe_relative_path;
		}

		$absolute_path = $url_parts['scheme'] . '://';

		// Schemeless URLs will make it this far, so we check for a host in the relative URL
		// and convert it to a protocol-URL.
		if ( isset( $relative_url_parts['host'] ) ) {
			$absolute_path .= $relative_url_parts['host'];
			if ( isset( $relative_url_parts['port'] ) ) {
				$absolute_path .= ':' . $relative_url_parts['port'];
			}
		} else {
			$absolute_path .= $url_parts['host'];
			if ( isset( $url_parts['port'] ) ) {
				$absolute_path .= ':' . $url_parts['port'];
			}
		}

		// Start off with the absolute URL path.
		$path = ! empty( $url_parts['path'] ) ? $url_parts['path'] : '/';

		// If it's a root-relative path, then great.
		if ( ! empty( $relative_url_parts['path'] ) && '/' === $relative_url_parts['path'][0] ) {
			$path = $relative_url_parts['path'];

			// Else it's a relative path.
		} elseif ( ! empty( $relative_url_parts['path'] ) ) {
			// Strip off any file components from the absolute path.
			$path = substr( $path, 0, strrpos( $path, '/' ) + 1 );

			// Build the new path.
			$path .= $relative_url_parts['path'];

			// Strip all /path/../ out of the path.
			while ( strpos( $path, '../' ) > 1 ) {
				$path = preg_replace( '![^/]+/\.\./!', '', $path );
			}

			// Strip any final leading ../ from the path.
			$path = preg_replace( '!^/(\.\./)+!', '', $path );
		}

		// Add the query string.
		if ( ! empty( $relative_url_parts['query'] ) ) {
			$path .= '?' . $relative_url_parts['query'];
		}

		// Add the fragment.
		if ( ! empty( $relative_url_parts['fragment'] ) ) {
			$path .= '#' . $relative_url_parts['fragment'];
		}

		return $absolute_path . '/' . ltrim( $path, '/' );
	}

	
	public static function handle_redirects( $url, $args, $response ) {
		// If no redirects are present, or, redirects were not requested, perform no action.
		if ( ! isset( $response['headers']['location'] ) || 0 === $args['_redirection'] ) {
			return false;
		}

		// Only perform redirections on redirection http codes.
		if ( $response['response']['code'] > 399 || $response['response']['code'] < 300 ) {
			return false;
		}

		// Don't redirect if we've run out of redirects.
		if ( $args['redirection']-- <= 0 ) {
			return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) );
		}

		$redirect_location = $response['headers']['location'];

		// If there were multiple Location headers, use the last header specified.
		if ( is_array( $redirect_location ) ) {
			$redirect_location = array_pop( $redirect_location );
		}

		$redirect_location = WP_Http::make_absolute_url( $redirect_location, $url );

		// POST requests should not POST to a redirected location.
		if ( 'POST' === $args['method'] ) {
			if ( in_array( $response['response']['code'], array( 302, 303 ), true ) ) {
				$args['method'] = 'GET';
			}
		}

		// Include valid cookies in the redirect process.
		if ( ! empty( $response['cookies'] ) ) {
			foreach ( $response['cookies'] as $cookie ) {
				if ( $cookie->test( $redirect_location ) ) {
					$args['cookies'][] = $cookie;
				}
			}
		}

		return wp_remote_request( $redirect_location, $args );
	}

	
	public static function is_ip_address( $maybe_ip ) {
		if ( preg_match( '/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/', $maybe_ip ) ) {
			return 4;
		}

		if ( str_contains( $maybe_ip, ':' ) && preg_match( '/^(((?=.*(::))(?!.*\3.+\3))\3?|([\dA-F]{1,4}(\3|:\b|$)|\2))(?4){5}((?4){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4})$/i', trim( $maybe_ip, ' []' ) ) ) {
			return 6;
		}

		return false;
	}
}