Jetpack_Client::remote_request() - Code Metrics - Inspection of "New build" - Automattic/jetpack - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — branch-4.4-built ( abb4b5...af0e43 )

unknown

created 2016-12-02 21:24 UTC

Jetpack_Client::remote_request() F

↳ Parent: Jetpack_Client

Complexity

Conditions	17
Paths	592

Size

Total Lines	134
Code Lines	80

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	17
eloc	80
nc	592
nop	2
dl	0
loc	134
rs	2.4245
c	0
b	0
f	0

How to fix Long Method Complexity

<?php

class Jetpack_Client {
	const WPCOM_JSON_API_VERSION = '1.1';

	/**
	 * Makes an authorized remote request using Jetpack_Signature
	 *
	 * @return array|WP_Error WP HTTP response on success
	 */
	public static function remote_request( $args, $body = null ) {
		$defaults = array(
			'url' => '',
			'user_id' => 0,
			'blog_id' => 0,
			'auth_location' => JETPACK_CLIENT__AUTH_LOCATION,
			'method' => 'POST',
			'timeout' => 10,
			'redirection' => 0,
			'headers' => array(),
			'stream' => false,
			'filename' => null,
		);

		$args = wp_parse_args( $args, $defaults );

		$args['blog_id'] = (int) $args['blog_id'];

		if ( 'header' != $args['auth_location'] ) {
			$args['auth_location'] = 'query_string';
		}

		$token = Jetpack_Data::get_access_token( $args['user_id'] );
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
		if ( !$token ) {
			return new Jetpack_Error( 'missing_token' );
		}

		$method = strtoupper( $args['method'] );

		$timeout = intval( $args['timeout'] );

		$redirection = $args['redirection'];
		$stream = $args['stream'];
		$filename = $args['filename'];

		$request = compact( 'method', 'body', 'timeout', 'redirection', 'stream', 'filename' );

		@list( $token_key, $secret ) = explode( '.', $token->secret );
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
		if ( empty( $token ) || empty( $secret ) ) {
			return new Jetpack_Error( 'malformed_token' );
		}

		$token_key = sprintf( '%s:%d:%d', $token_key, JETPACK__API_VERSION, $token->external_user_id );

		require_once JETPACK__PLUGIN_DIR . 'class.jetpack-signature.php';

		$time_diff = (int) Jetpack_Options::get_option( 'time_diff' );
		$jetpack_signature = new Jetpack_Signature( $token->secret, $time_diff );

		$timestamp = time() + $time_diff;

		if( function_exists( 'wp_generate_password' ) ) {
			$nonce = wp_generate_password( 10, false );
		} else {
			$nonce = substr( sha1( rand( 0, 1000000 ) ), 0, 10);
		}

		// Kind of annoying.  Maybe refactor Jetpack_Signature to handle body-hashing
		if ( is_null( $body ) ) {
			$body_hash = '';

		} else {
			// Allow arrays to be used in passing data.
			$body_to_hash = $body;

			if ( is_array( $body ) ) {
				// We cast this to a new variable, because the array form of $body needs to be
				// maintained so it can be passed into the request later on in the code.
				if ( count( $body ) > 0 ) {
					$body_to_hash = json_encode( self::_stringify_data( $body ) );
				} else {
					$body_to_hash = '';
				}
			}

			if ( ! is_string( $body_to_hash ) ) {
				return new Jetpack_Error( 'invalid_body', 'Body is malformed.' );
			}

			$body_hash = jetpack_sha1_base64( $body_to_hash );
		}

		$auth = array(
			'token' => $token_key,
			'timestamp' => $timestamp,
			'nonce' => $nonce,
			'body-hash' => $body_hash,
		);

		if ( false !== strpos( $args['url'], 'xmlrpc.php' ) ) {
			$url_args = array(
				'for'           => 'jetpack',
				'wpcom_blog_id' => Jetpack_Options::get_option( 'id' ),
			);
		} else {
			$url_args = array();
		}

		if ( 'header' != $args['auth_location'] ) {
			$url_args += $auth;
		}

		$url = add_query_arg( urlencode_deep( $url_args ), $args['url'] );
		$url = Jetpack::fix_url_for_bad_hosts( $url );

		$signature = $jetpack_signature->sign_request( $token_key, $timestamp, $nonce, $body_hash, $method, $url, $body, false );

		if ( !$signature || is_wp_error( $signature ) ) {
			return $signature;
		}

		// Send an Authorization header so various caches/proxies do the right thing
		$auth['signature'] = $signature;
		$auth['version'] = JETPACK__VERSION;
		$header_pieces = array();
		foreach ( $auth as $key => $value ) {
			$header_pieces[] = sprintf( '%s="%s"', $key, $value );
		}
		$request['headers'] = array_merge( $args['headers'], array(
			'Authorization' => "X_JETPACK " . join( ' ', $header_pieces ),
		) );

		// Make sure we keep the host when we do JETPACK__WPCOM_JSON_API_HOST requests.
		$host = parse_url( $url, PHP_URL_HOST );
		if ( $host === JETPACK__WPCOM_JSON_API_HOST ) {
			$request['headers']['Host'] = 'public-api.wordpress.com';
		}

		if ( 'header' != $args['auth_location'] ) {
			$url = add_query_arg( 'signature', urlencode( $signature ), $url );
		}

		return Jetpack_Client::_wp_remote_request( $url, $request );
	}

	/**
	 * Wrapper for wp_remote_request().  Turns off SSL verification for certain SSL errors.
	 * This is lame, but many, many, many hosts have misconfigured SSL.
	 *
	 * When Jetpack is registered, the jetpack_fallback_no_verify_ssl_certs option is set to the current time if:
	 * 1. a certificate error is found AND
	 * 2. not verifying the certificate works around the problem.
	 *
	 * The option is checked on each request.
	 *
	 * @internal
	 * @see Jetpack::fix_url_for_bad_hosts()
	 *
	 * @return array|WP_Error WP HTTP response on success
	 */
	public static function _wp_remote_request( $url, $args, $set_fallback = false ) {
		/**
		 * SSL verification (`sslverify`) for the JetpackClient remote request
		 * defaults to off, use this filter to force it on.
		 *
		 * Return `true` to ENABLE SSL verification, return `false`
		 * to DISABLE SSL verification.
		 *
		 * @since 3.6.0
		 *
		 * @param bool Whether to force `sslverify` or not.
		 */
		if ( apply_filters( 'jetpack_client_verify_ssl_certs', false ) ) {
			return wp_remote_request( $url, $args );
		}

		$fallback = Jetpack_Options::get_option( 'fallback_no_verify_ssl_certs' );
		if ( false === $fallback ) {
			Jetpack_Options::update_option( 'fallback_no_verify_ssl_certs', 0 );
		}

		if ( (int) $fallback ) {
			// We're flagged to fallback
			$args['sslverify'] = false;
		}

		$response = wp_remote_request( $url, $args );

		if (
			!$set_fallback                                     // We're not allowed to set the flag on this request, so whatever happens happens
		||
			isset( $args['sslverify'] ) && !$args['sslverify'] // No verification - no point in doing it again
		||
			!is_wp_error( $response )                          // Let it ride
		) {
			Jetpack_Client::set_time_diff( $response, $set_fallback );
			return $response;
		}

		// At this point, we're not flagged to fallback and we are allowed to set the flag on this request.

		$message = $response->get_error_message();

		// Is it an SSL Certificate verification error?
		if (
			false === strpos( $message, '14090086' ) // OpenSSL SSL3 certificate error
		&&
			false === strpos( $message, '1407E086' ) // OpenSSL SSL2 certificate error
		&&
			false === strpos( $message, 'error setting certificate verify locations' ) // cURL CA bundle not found
		&&
			false === strpos( $message, 'Peer certificate cannot be authenticated with' ) // cURL CURLE_SSL_CACERT: CA bundle found, but not helpful
			                                                                              // different versions of curl have different error messages
			                                                                              // this string should catch them all
		&&
			false === strpos( $message, 'Problem with the SSL CA cert' ) // cURL CURLE_SSL_CACERT_BADFILE: probably access rights
		) {
			// No, it is not.
			return $response;
		}

		// Redo the request without SSL certificate verification.
		$args['sslverify'] = false;
		$response = wp_remote_request( $url, $args );

		if ( !is_wp_error( $response ) ) {
			// The request went through this time, flag for future fallbacks
			Jetpack_Options::update_option( 'fallback_no_verify_ssl_certs', time() );
			Jetpack_Client::set_time_diff( $response, $set_fallback );
		}

		return $response;
	}

	public static function set_time_diff( &$response, $force_set = false ) {
		$code = wp_remote_retrieve_response_code( $response );

		// Only trust the Date header on some responses
		if ( 200 != $code && 304 != $code && 400 != $code && 401 != $code ) {
			return;
		}

		if ( !$date = wp_remote_retrieve_header( $response, 'date' ) ) {
			return;
		}

		if ( 0 >= $time = (int) strtotime( $date ) ) {
			return;
		}

		$time_diff = $time - time();

		if ( $force_set ) { // during register
			Jetpack_Options::update_option( 'time_diff', $time_diff );
		} else { // otherwise
			$old_diff = Jetpack_Options::get_option( 'time_diff' );
			if ( false === $old_diff || abs( $time_diff - (int) $old_diff ) > 10 ) {
				Jetpack_Options::update_option( 'time_diff', $time_diff );
			}
		}
	}

	/**
	 * Query the WordPress.com REST API using the blog token
	 *
	 * @param string  $path
	 * @param string  $version
	 * @param array   $args
	 * @param string  $body

	 * @return array|WP_Error $response Data.
	 */
	static function wpcom_json_api_request_as_blog( $path, $version = self::WPCOM_JSON_API_VERSION, $args = array(), $body = null ) {
		$filtered_args = array_intersect_key( $args, array(
			'method'      => 'string',
			'timeout'     => 'int',
			'redirection' => 'int',
			'stream'      => 'boolean',
			'filename'    => 'string',
		) );

		/**
		 * Determines whether Jetpack can send outbound https requests to the WPCOM api.
		 *
		 * @since 3.6.0
		 *
		 * @param bool $proto Defaults to true.
		 */
		$proto = apply_filters( 'jetpack_can_make_outbound_https', true ) ? 'https' : 'http';

		// unprecedingslashit
		$_path = preg_replace( '/^\//', '', $path );

		// Use GET by default whereas `remote_request` uses POST
		if ( isset( $filtered_args['method'] ) && strtoupper( $filtered_args['method'] === 'POST' ) ) {
			$request_method = 'POST';
		} else {
			$request_method = 'GET';
		}

		$validated_args = array_merge( $filtered_args, array(
			'url'     => sprintf( '%s://%s/rest/v%s/%s', $proto, JETPACK__WPCOM_JSON_API_HOST, $version, $_path ),
			'blog_id' => (int) Jetpack_Options::get_option( 'id' ),
			'method'  => $request_method,
		) );

		return Jetpack_Client::remote_request( $validated_args, $body );
	}

	/**
	 * Takes an array or similar structure and recursively turns all values into strings. This is used to
	 * make sure that body hashes are made ith the string version, which is what will be seen after a
	 * server pulls up the data in the $_POST array.
	 *
	 * @param array|mixed $data
	 *
	 * @return array|string
	 */
	public static function _stringify_data( $data ) {

		// Booleans are special, lets just makes them and explicit 1/0 instead of the 0 being an empty string.
		if ( is_bool( $data ) ) {
			return $data ? "1" : "0";
		}

		// Cast objects into arrays.
		if ( is_object( $data ) ) {
			$data = (array) $data;
		}

		// Non arrays at this point should be just converted to strings.
		if ( ! is_array( $data ) ) {
			return (string)$data;
		}

		foreach ( $data as $key => &$value ) {
			$value = self::_stringify_data( $value );
		}

		return $data;
	}
}


1			<?php
2
3			class Jetpack_Client {
4			const WPCOM_JSON_API_VERSION = '1.1';
5
6			/**
7			* Makes an authorized remote request using Jetpack_Signature
8			*
9			* @return array\|WP_Error WP HTTP response on success
10			*/
11			public static function remote_request( $args, $body = null ) {
12			$defaults = array(
13			'url' => '',
14			'user_id' => 0,
15			'blog_id' => 0,
16			'auth_location' => JETPACK_CLIENT__AUTH_LOCATION,
17			'method' => 'POST',
18			'timeout' => 10,
19			'redirection' => 0,
20			'headers' => array(),
21			'stream' => false,
22			'filename' => null,
23			);
24
25			$args = wp_parse_args( $args, $defaults );
26
27			$args['blog_id'] = (int) $args['blog_id'];
28
29			if ( 'header' != $args['auth_location'] ) {
30			$args['auth_location'] = 'query_string';
31			}
32
33			$token = Jetpack_Data::get_access_token( $args['user_id'] );
			0 ignored issues – show Documentation introduced 2015-11-20 23:03 UTC by Report Bug Copy Issue Report `$args['user_id']` is of type `integer\|string`, but the function expects a `boolean`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
34			if ( !$token ) {
35			return new Jetpack_Error( 'missing_token' );
36			}
37
38			$method = strtoupper( $args['method'] );
39
40			$timeout = intval( $args['timeout'] );
41
42			$redirection = $args['redirection'];
43			$stream = $args['stream'];
44			$filename = $args['filename'];
45
46			$request = compact( 'method', 'body', 'timeout', 'redirection', 'stream', 'filename' );
47
48			@list( $token_key, $secret ) = explode( '.', $token->secret );
			0 ignored issues – show Security Best Practice introduced 2015-11-20 23:03 UTC by Report Bug Copy Issue Report It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended. If you suppress an error, we recommend checking for the error condition explicitly: // For example instead of @mkdir($dir); // Better use if (@mkdir($dir) === false) { throw new \RuntimeException('The directory '.$dir.' could not be created.'); } Loading history...
49			if ( empty( $token ) \|\| empty( $secret ) ) {
50			return new Jetpack_Error( 'malformed_token' );
51			}
52
53			$token_key = sprintf( '%s:%d:%d', $token_key, JETPACK__API_VERSION, $token->external_user_id );
54
55			require_once JETPACK__PLUGIN_DIR . 'class.jetpack-signature.php';
56
57			$time_diff = (int) Jetpack_Options::get_option( 'time_diff' );
58			$jetpack_signature = new Jetpack_Signature( $token->secret, $time_diff );
59
60			$timestamp = time() + $time_diff;
61
62			if( function_exists( 'wp_generate_password' ) ) {
63			$nonce = wp_generate_password( 10, false );
64			} else {
65			$nonce = substr( sha1( rand( 0, 1000000 ) ), 0, 10);
66			}
67
68			// Kind of annoying. Maybe refactor Jetpack_Signature to handle body-hashing
69			if ( is_null( $body ) ) {
70			$body_hash = '';
71
72			} else {
73			// Allow arrays to be used in passing data.
74			$body_to_hash = $body;
75
76			if ( is_array( $body ) ) {
77			// We cast this to a new variable, because the array form of $body needs to be
78			// maintained so it can be passed into the request later on in the code.
79			if ( count( $body ) > 0 ) {
80			$body_to_hash = json_encode( self::_stringify_data( $body ) );
81			} else {
82			$body_to_hash = '';
83			}
84			}
85
86			if ( ! is_string( $body_to_hash ) ) {
87			return new Jetpack_Error( 'invalid_body', 'Body is malformed.' );
88			}
89
90			$body_hash = jetpack_sha1_base64( $body_to_hash );
91			}
92
93			$auth = array(
94			'token' => $token_key,
95			'timestamp' => $timestamp,
96			'nonce' => $nonce,
97			'body-hash' => $body_hash,
98			);
99
100			if ( false !== strpos( $args['url'], 'xmlrpc.php' ) ) {
101			$url_args = array(
102			'for' => 'jetpack',
103			'wpcom_blog_id' => Jetpack_Options::get_option( 'id' ),
104			);
105			} else {
106			$url_args = array();
107			}
108
109			if ( 'header' != $args['auth_location'] ) {
110			$url_args += $auth;
111			}
112
113			$url = add_query_arg( urlencode_deep( $url_args ), $args['url'] );
114			$url = Jetpack::fix_url_for_bad_hosts( $url );
115
116			$signature = $jetpack_signature->sign_request( $token_key, $timestamp, $nonce, $body_hash, $method, $url, $body, false );
117
118			if ( !$signature \|\| is_wp_error( $signature ) ) {
119			return $signature;
120			}
121
122			// Send an Authorization header so various caches/proxies do the right thing
123			$auth['signature'] = $signature;
124			$auth['version'] = JETPACK__VERSION;
125			$header_pieces = array();
126			foreach ( $auth as $key => $value ) {
127			$header_pieces[] = sprintf( '%s="%s"', $key, $value );
128			}
129			$request['headers'] = array_merge( $args['headers'], array(
130			'Authorization' => "X_JETPACK " . join( ' ', $header_pieces ),
131			) );
132
133			// Make sure we keep the host when we do JETPACK__WPCOM_JSON_API_HOST requests.
134			$host = parse_url( $url, PHP_URL_HOST );
135			if ( $host === JETPACK__WPCOM_JSON_API_HOST ) {
136			$request['headers']['Host'] = 'public-api.wordpress.com';
137			}
138
139			if ( 'header' != $args['auth_location'] ) {
140			$url = add_query_arg( 'signature', urlencode( $signature ), $url );
141			}
142
143			return Jetpack_Client::_wp_remote_request( $url, $request );
144			}
145
146			/**
147			* Wrapper for wp_remote_request(). Turns off SSL verification for certain SSL errors.
148			* This is lame, but many, many, many hosts have misconfigured SSL.
149			*
150			* When Jetpack is registered, the jetpack_fallback_no_verify_ssl_certs option is set to the current time if:
151			* 1. a certificate error is found AND
152			* 2. not verifying the certificate works around the problem.
153			*
154			* The option is checked on each request.
155			*
156			* @internal
157			* @see Jetpack::fix_url_for_bad_hosts()
158			*
159			* @return array\|WP_Error WP HTTP response on success
160			*/
161			public static function _wp_remote_request( $url, $args, $set_fallback = false ) {
162			/**
163			* SSL verification (`sslverify`) for the JetpackClient remote request
164			* defaults to off, use this filter to force it on.
165			*
166			* Return `true` to ENABLE SSL verification, return `false`
167			* to DISABLE SSL verification.
168			*
169			* @since 3.6.0
170			*
171			* @param bool Whether to force `sslverify` or not.
172			*/
173			if ( apply_filters( 'jetpack_client_verify_ssl_certs', false ) ) {
174			return wp_remote_request( $url, $args );
175			}
176
177			$fallback = Jetpack_Options::get_option( 'fallback_no_verify_ssl_certs' );
178			if ( false === $fallback ) {
179			Jetpack_Options::update_option( 'fallback_no_verify_ssl_certs', 0 );
180			}
181
182			if ( (int) $fallback ) {
183			// We're flagged to fallback
184			$args['sslverify'] = false;
185			}
186
187			$response = wp_remote_request( $url, $args );
188
189			if (
190			!$set_fallback // We're not allowed to set the flag on this request, so whatever happens happens
191			\|\|
192			isset( $args['sslverify'] ) && !$args['sslverify'] // No verification - no point in doing it again
193			\|\|
194			!is_wp_error( $response ) // Let it ride
195			) {
196			Jetpack_Client::set_time_diff( $response, $set_fallback );
197			return $response;
198			}
199
200			// At this point, we're not flagged to fallback and we are allowed to set the flag on this request.
201
202			$message = $response->get_error_message();
203
204			// Is it an SSL Certificate verification error?
205			if (
206			false === strpos( $message, '14090086' ) // OpenSSL SSL3 certificate error
207			&&
208			false === strpos( $message, '1407E086' ) // OpenSSL SSL2 certificate error
209			&&
210			false === strpos( $message, 'error setting certificate verify locations' ) // cURL CA bundle not found
211			&&
212			false === strpos( $message, 'Peer certificate cannot be authenticated with' ) // cURL CURLE_SSL_CACERT: CA bundle found, but not helpful
213			// different versions of curl have different error messages
214			// this string should catch them all
215			&&
216			false === strpos( $message, 'Problem with the SSL CA cert' ) // cURL CURLE_SSL_CACERT_BADFILE: probably access rights
217			) {
218			// No, it is not.
219			return $response;
220			}
221
222			// Redo the request without SSL certificate verification.
223			$args['sslverify'] = false;
224			$response = wp_remote_request( $url, $args );
225
226			if ( !is_wp_error( $response ) ) {
227			// The request went through this time, flag for future fallbacks
228			Jetpack_Options::update_option( 'fallback_no_verify_ssl_certs', time() );
229			Jetpack_Client::set_time_diff( $response, $set_fallback );
230			}
231
232			return $response;
233			}
234
235			public static function set_time_diff( &$response, $force_set = false ) {
236			$code = wp_remote_retrieve_response_code( $response );
237
238			// Only trust the Date header on some responses
239			if ( 200 != $code && 304 != $code && 400 != $code && 401 != $code ) {
240			return;
241			}
242
243			if ( !$date = wp_remote_retrieve_header( $response, 'date' ) ) {
244			return;
245			}
246
247			if ( 0 >= $time = (int) strtotime( $date ) ) {
248			return;
249			}
250
251			$time_diff = $time - time();
252
253			if ( $force_set ) { // during register
254			Jetpack_Options::update_option( 'time_diff', $time_diff );
255			} else { // otherwise
256			$old_diff = Jetpack_Options::get_option( 'time_diff' );
257			if ( false === $old_diff \|\| abs( $time_diff - (int) $old_diff ) > 10 ) {
258			Jetpack_Options::update_option( 'time_diff', $time_diff );
259			}
260			}
261			}
262
263			/**
264			* Query the WordPress.com REST API using the blog token
265			*
266			* @param string $path
267			* @param string $version
268			* @param array $args
269			* @param string $body
			0 ignored issues – show Documentation introduced 2015-11-20 23:03 UTC by Report Bug Copy Issue Report Should the type for parameter `$body` not be `string\|null`? This check looks for `@param` annotations where the type inferred by our type inference engine differs from the declared type. It makes a suggestion as to what type it considers more descriptive. Most often this is a case of a parameter that can be null in addition to its declared types. Loading history...
270			* @return array\|WP_Error $response Data.
271			*/
272			static function wpcom_json_api_request_as_blog( $path, $version = self::WPCOM_JSON_API_VERSION, $args = array(), $body = null ) {
273			$filtered_args = array_intersect_key( $args, array(
274			'method' => 'string',
275			'timeout' => 'int',
276			'redirection' => 'int',
277			'stream' => 'boolean',
278			'filename' => 'string',
279			) );
280
281			/**
282			* Determines whether Jetpack can send outbound https requests to the WPCOM api.
283			*
284			* @since 3.6.0
285			*
286			* @param bool $proto Defaults to true.
287			*/
288			$proto = apply_filters( 'jetpack_can_make_outbound_https', true ) ? 'https' : 'http';
289
290			// unprecedingslashit
291			$_path = preg_replace( '/^\//', '', $path );
292
293			// Use GET by default whereas `remote_request` uses POST
294			if ( isset( $filtered_args['method'] ) && strtoupper( $filtered_args['method'] === 'POST' ) ) {
295			$request_method = 'POST';
296			} else {
297			$request_method = 'GET';
298			}
299
300			$validated_args = array_merge( $filtered_args, array(
301			'url' => sprintf( '%s://%s/rest/v%s/%s', $proto, JETPACK__WPCOM_JSON_API_HOST, $version, $_path ),
302			'blog_id' => (int) Jetpack_Options::get_option( 'id' ),
303			'method' => $request_method,
304			) );
305
306			return Jetpack_Client::remote_request( $validated_args, $body );
307			}
308
309			/**
310			* Takes an array or similar structure and recursively turns all values into strings. This is used to
311			* make sure that body hashes are made ith the string version, which is what will be seen after a
312			* server pulls up the data in the $_POST array.
313			*
314			* @param array\|mixed $data
315			*
316			* @return array\|string
317			*/
318			public static function _stringify_data( $data ) {
319
320			// Booleans are special, lets just makes them and explicit 1/0 instead of the 0 being an empty string.
321			if ( is_bool( $data ) ) {
322			return $data ? "1" : "0";
323			}
324
325			// Cast objects into arrays.
326			if ( is_object( $data ) ) {
327			$data = (array) $data;
328			}
329
330			// Non arrays at this point should be just converted to strings.
331			if ( ! is_array( $data ) ) {
332			return (string)$data;
333			}
334
335			foreach ( $data as $key => &$value ) {
336			$value = self::_stringify_data( $value );
337			}
338
339			return $data;
340			}
341			}
342

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