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| 1 | <?php |
| 2 | /** |
| 3 | * The Connection Client class file. |
| 4 | * |
| 5 | * @package automattic/jetpack-connection |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack\Connection; |
| 9 | |
| 10 | use Automattic\Jetpack\Constants; |
| 11 | use WP_Error; |
| 12 | |
| 13 | // `wp_remote_request` returns an array with a particular format. |
| 14 | '@phan-type _WP_Remote_Response_Array = array{headers:\WpOrg\Requests\Utility\CaseInsensitiveDictionary,body:string,response:array{code:int,message:string},cookies:\WP_HTTP_Cookie[],filename:?string,http_response:WP_HTTP_Requests_Response}'; |
| 15 | |
| 16 | /** |
| 17 | * The Client class that is used to connect to WordPress.com Jetpack API. |
| 18 | */ |
| 19 | class Client { |
| 20 | const WPCOM_JSON_API_VERSION = '1.1'; |
| 21 | |
| 22 | /** |
| 23 | * Makes an authorized remote request using Jetpack_Signature |
| 24 | * |
| 25 | * @param array $args the arguments for the remote request. |
| 26 | * @param array|string|null $body the request body. |
| 27 | * @return array|WP_Error WP HTTP response on success |
| 28 | * @phan-return _WP_Remote_Response_Array|WP_Error |
| 29 | */ |
| 30 | public static function remote_request( $args, $body = null ) { |
| 31 | if ( isset( $args['url'] ) ) { |
| 32 | /** |
| 33 | * Filters the remote request url. |
| 34 | * |
| 35 | * @since 1.30.12 |
| 36 | * |
| 37 | * @param string The remote request url. |
| 38 | */ |
| 39 | $args['url'] = apply_filters( 'jetpack_remote_request_url', $args['url'] ); |
| 40 | } |
| 41 | |
| 42 | // Feed failures into the outgoing-request error flow of Error_Handler: any known |
| 43 | // connection error is stored and surfaced to the user. See the Error_Handler |
| 44 | // class docblock for the full picture of both error-handling flows. |
| 45 | // Outgoing XML-RPC calls (Jetpack_IXR_Client) are funneled through this method too; |
| 46 | // tell the transports apart by the endpoint the request targets. |
| 47 | // The literals match Error_Handler::ERROR_TYPE_XMLRPC / ERROR_TYPE_REST. The constants |
| 48 | // themselves must not be referenced from this class: during a plugin update, a stale |
| 49 | // Error_Handler that predates them can already be loaded, and resolving them against |
| 50 | // it would fatal the request. |
| 51 | $request_path = (string) wp_parse_url( empty( $args['url'] ) ? '' : $args['url'], PHP_URL_PATH ); |
| 52 | $error_type = '/xmlrpc.php' === substr( $request_path, -strlen( '/xmlrpc.php' ) ) ? 'xmlrpc' : 'rest'; |
| 53 | |
| 54 | $result = self::build_signed_request( $args, $body ); |
| 55 | if ( is_wp_error( $result ) ) { |
| 56 | // The request was never made, so it has no response to check. Report the signing |
| 57 | // failure; attribution comes from the error itself — see |
| 58 | // `Error_Handler::check_signed_request_for_errors()`. |
| 59 | // Reporting is best-effort and must never fatal a request running mid-plugin-update: |
| 60 | // skip it when the already-loaded Error_Handler is a stale version predating this method. |
| 61 | if ( method_exists( Error_Handler::class, 'check_signed_request_for_errors' ) ) { |
| 62 | Error_Handler::get_instance()->check_signed_request_for_errors( |
| 63 | $result, |
| 64 | empty( $args['url'] ) ? '' : $args['url'], |
| 65 | empty( $args['method'] ) ? 'POST' : $args['method'], |
| 66 | $error_type |
| 67 | ); |
| 68 | } |
| 69 | |
| 70 | return $result; |
| 71 | } |
| 72 | |
| 73 | $response = self::_wp_remote_request( $result['url'], $result['request'] ); |
| 74 | |
| 75 | Error_Handler::get_instance()->check_api_response_for_errors( |
| 76 | $response, |
| 77 | $result['auth'], |
| 78 | empty( $args['url'] ) ? '' : $args['url'], |
| 79 | empty( $args['method'] ) ? 'POST' : $args['method'], |
| 80 | $error_type |
| 81 | ); |
| 82 | |
| 83 | /** |
| 84 | * Fired when the remote request response has been received. |
| 85 | * |
| 86 | * @since 1.30.8 |
| 87 | * |
| 88 | * @param array|WP_Error The HTTP response. |
| 89 | */ |
| 90 | do_action( 'jetpack_received_remote_request_response', $response ); |
| 91 | |
| 92 | return $response; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Adds authorization signature to a remote request using Jetpack_Signature |
| 97 | * |
| 98 | * @param array $args the arguments for the remote request. |
| 99 | * @param array|string|null $body the request body. |
| 100 | * @return WP_Error|array{url:string,request:array,auth:array} { |
| 101 | * An array containing URL and request items. |
| 102 | * |
| 103 | * @type string $url The request URL. |
| 104 | * @type array $request Request arguments. |
| 105 | * @type array $auth Authorization data. |
| 106 | * } |
| 107 | */ |
| 108 | public static function build_signed_request( $args, $body = null ) { |
| 109 | add_filter( |
| 110 | 'jetpack_constant_default_value', |
| 111 | __NAMESPACE__ . '\Utils::jetpack_api_constant_filter', |
| 112 | 10, |
| 113 | 2 |
| 114 | ); |
| 115 | |
| 116 | $defaults = array( |
| 117 | 'url' => '', |
| 118 | 'user_id' => 0, |
| 119 | 'blog_id' => 0, |
| 120 | 'auth_location' => Constants::get_constant( 'JETPACK_CLIENT__AUTH_LOCATION' ), |
| 121 | 'method' => 'POST', |
| 122 | 'format' => 'json', |
| 123 | 'timeout' => 10, |
| 124 | 'redirection' => 0, |
| 125 | 'headers' => array(), |
| 126 | 'stream' => false, |
| 127 | 'filename' => null, |
| 128 | 'sslverify' => true, |
| 129 | ); |
| 130 | |
| 131 | $args = wp_parse_args( $args, $defaults ); |
| 132 | |
| 133 | $args['blog_id'] = (int) $args['blog_id']; |
| 134 | |
| 135 | if ( 'header' !== $args['auth_location'] ) { |
| 136 | $args['auth_location'] = 'query_string'; |
| 137 | } |
| 138 | |
| 139 | // Return the specific reason the token could not be loaded instead of a bare `false`. |
| 140 | // Note the returned `WP_Error` is truthy, so this must not be tested with `! $token`. |
| 141 | $token = ( new Tokens() )->get_access_token( |
| 142 | $args['user_id'], |
| 143 | false, // token_key |
| 144 | false // suppress_errors |
| 145 | ); |
| 146 | if ( is_wp_error( $token ) ) { |
| 147 | return $token; |
| 148 | } |
| 149 | if ( ! $token ) { |
| 150 | // `get_access_token()` explains itself for every case but one: it returns a bare |
| 151 | // `false` when the tokens are locked. That lock is one-shot and self-healing. |
| 152 | return new WP_Error( 'tokens_locked' ); |
| 153 | } |
| 154 | |
| 155 | $method = strtoupper( $args['method'] ); |
| 156 | |
| 157 | $timeout = (int) $args['timeout']; |
| 158 | |
| 159 | $redirection = $args['redirection']; |
| 160 | $stream = $args['stream']; |
| 161 | $filename = $args['filename']; |
| 162 | $sslverify = $args['sslverify']; |
| 163 | |
| 164 | $request = compact( 'method', 'body', 'timeout', 'redirection', 'stream', 'filename', 'sslverify' ); |
| 165 | |
| 166 | @list( $token_key, $secret ) = explode( '.', $token->secret ); // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged |
| 167 | if ( ! $secret ) { |
| 168 | return new WP_Error( 'malformed_token' ); |
| 169 | } |
| 170 | |
| 171 | $token_key = sprintf( |
| 172 | '%s:%d:%d', |
| 173 | $token_key, |
| 174 | Constants::get_constant( 'JETPACK__API_VERSION' ), |
| 175 | $token->external_user_id |
| 176 | ); |
| 177 | |
| 178 | $time_diff = (int) \Jetpack_Options::get_option( 'time_diff' ); |
| 179 | $jetpack_signature = new \Jetpack_Signature( $token->secret, $time_diff ); |
| 180 | |
| 181 | $timestamp = time() + $time_diff; |
| 182 | |
| 183 | if ( function_exists( 'wp_generate_password' ) ) { |
| 184 | $nonce = wp_generate_password( 10, false ); |
| 185 | } else { |
| 186 | $nonce = substr( sha1( (string) wp_rand( 0, 1000000 ) ), 0, 10 ); |
| 187 | } |
| 188 | |
| 189 | // Kind of annoying. Maybe refactor Jetpack_Signature to handle body-hashing. |
| 190 | if ( $body === null ) { |
| 191 | $body_hash = ''; |
| 192 | |
| 193 | } else { |
| 194 | // Allow arrays to be used in passing data. |
| 195 | $body_to_hash = $body; |
| 196 | |
| 197 | if ( $args['format'] === 'jsonl' ) { |
| 198 | parse_str( $body, $body_to_hash ); |
| 199 | } |
| 200 | if ( is_array( $body_to_hash ) ) { |
| 201 | // We cast this to a new variable, because the array form of $body needs to be |
| 202 | // maintained so it can be passed into the request later on in the code. |
| 203 | if ( array() !== $body_to_hash ) { |
| 204 | $body_to_hash = wp_json_encode( |
| 205 | self::_stringify_data( $body_to_hash ), |
| 206 | 0 // phpcs:ignore Jetpack.Functions.JsonEncodeFlags.ZeroFound -- No `json_encode()` flags because this needs to match whatever is calculating the hash on the other end. |
| 207 | ); |
| 208 | } else { |
| 209 | $body_to_hash = ''; |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | if ( ! is_string( $body_to_hash ) ) { |
| 214 | return new WP_Error( 'invalid_body', 'Body is malformed.' ); |
| 215 | } |
| 216 | $body_hash = base64_encode( sha1( $body_to_hash, true ) ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode |
| 217 | } |
| 218 | |
| 219 | $auth = array( |
| 220 | 'token' => $token_key, |
| 221 | 'timestamp' => $timestamp, |
| 222 | 'nonce' => $nonce, |
| 223 | 'body-hash' => $body_hash, |
| 224 | ); |
| 225 | |
| 226 | if ( false !== strpos( $args['url'], 'xmlrpc.php' ) ) { |
| 227 | $url_args = array( |
| 228 | 'for' => 'jetpack', |
| 229 | 'wpcom_blog_id' => \Jetpack_Options::get_option( 'id' ), |
| 230 | ); |
| 231 | } else { |
| 232 | $url_args = array(); |
| 233 | } |
| 234 | |
| 235 | if ( 'header' !== $args['auth_location'] ) { |
| 236 | $url_args += $auth; |
| 237 | } |
| 238 | |
| 239 | $url = add_query_arg( urlencode_deep( $url_args ), $args['url'] ); |
| 240 | |
| 241 | $signature = $jetpack_signature->sign_request( $token_key, $timestamp, $nonce, $body_hash, $method, $url, $body, false ); |
| 242 | |
| 243 | if ( is_wp_error( $signature ) ) { |
| 244 | return $signature; |
| 245 | } |
| 246 | |
| 247 | // Send an Authorization header so various caches/proxies do the right thing. |
| 248 | $auth['signature'] = $signature; |
| 249 | $auth['version'] = Constants::get_constant( 'JETPACK__VERSION' ); |
| 250 | $header_pieces = array(); |
| 251 | foreach ( $auth as $key => $value ) { |
| 252 | $header_pieces[] = sprintf( '%s="%s"', $key, $value ); |
| 253 | } |
| 254 | $request['headers'] = array_merge( |
| 255 | $args['headers'], |
| 256 | array( |
| 257 | 'Authorization' => 'X_JETPACK ' . implode( ' ', $header_pieces ), |
| 258 | ) |
| 259 | ); |
| 260 | |
| 261 | if ( 'header' !== $args['auth_location'] ) { |
| 262 | $url = add_query_arg( 'signature', rawurlencode( $signature ), $url ); |
| 263 | } |
| 264 | |
| 265 | return compact( 'url', 'request', 'auth' ); |
| 266 | } |
| 267 | |
| 268 | /** |
| 269 | * Wrapper for wp_remote_request(). Turns off SSL verification for certain SSL errors. |
| 270 | * This is lame, but many, many, many hosts have misconfigured SSL. |
| 271 | * |
| 272 | * When Jetpack is registered, the jetpack_fallback_no_verify_ssl_certs option is set to the current time if: |
| 273 | * 1. a certificate error is found AND |
| 274 | * 2. not verifying the certificate works around the problem. |
| 275 | * |
| 276 | * The option is checked on each request. |
| 277 | * |
| 278 | * @internal |
| 279 | * |
| 280 | * @param string $url the request URL. |
| 281 | * @param array $args request arguments. |
| 282 | * @param boolean $set_fallback whether to allow flagging this request to use a fallback certficate override. |
| 283 | * @return array|WP_Error WP HTTP response on success |
| 284 | * @phan-return _WP_Remote_Response_Array|WP_Error |
| 285 | */ |
| 286 | public static function _wp_remote_request( $url, $args, $set_fallback = false ) { // phpcs:ignore PSR2.Methods.MethodDeclaration.Underscore |
| 287 | $fallback = \Jetpack_Options::get_option( 'fallback_no_verify_ssl_certs' ); |
| 288 | if ( false === $fallback ) { |
| 289 | \Jetpack_Options::update_option( 'fallback_no_verify_ssl_certs', 0 ); |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * SSL verification (`sslverify`) for the JetpackClient remote request |
| 294 | * defaults to off, use this filter to force it on. |
| 295 | * |
| 296 | * Return `true` to ENABLE SSL verification, return `false` |
| 297 | * to DISABLE SSL verification. |
| 298 | * |
| 299 | * @since 1.7.0 |
| 300 | * @since-jetpack 3.6.0 |
| 301 | * |
| 302 | * @param bool Whether to force `sslverify` or not. |
| 303 | */ |
| 304 | if ( apply_filters( 'jetpack_client_verify_ssl_certs', false ) ) { |
| 305 | return wp_remote_request( $url, $args ); |
| 306 | } |
| 307 | |
| 308 | if ( (int) $fallback ) { |
| 309 | // We're flagged to fallback. |
| 310 | $args['sslverify'] = false; |
| 311 | } |
| 312 | |
| 313 | $response = wp_remote_request( $url, $args ); |
| 314 | |
| 315 | if ( |
| 316 | ! $set_fallback // We're not allowed to set the flag on this request, so whatever happens happens. |
| 317 | || |
| 318 | isset( $args['sslverify'] ) && ! $args['sslverify'] // No verification - no point in doing it again. |
| 319 | || |
| 320 | ! is_wp_error( $response ) // Let it ride. |
| 321 | ) { |
| 322 | self::set_time_diff( $response, $set_fallback ); |
| 323 | return $response; |
| 324 | } |
| 325 | |
| 326 | // At this point, we're not flagged to fallback and we are allowed to set the flag on this request. |
| 327 | |
| 328 | $message = $response->get_error_message(); |
| 329 | |
| 330 | // Is it an SSL Certificate verification error? |
| 331 | if ( |
| 332 | false === strpos( $message, '14090086' ) // OpenSSL SSL3 certificate error. |
| 333 | && |
| 334 | false === strpos( $message, '1407E086' ) // OpenSSL SSL2 certificate error. |
| 335 | && |
| 336 | false === strpos( $message, 'error setting certificate verify locations' ) // cURL CA bundle not found. |
| 337 | && |
| 338 | false === strpos( $message, 'Peer certificate cannot be authenticated with' ) // cURL CURLE_SSL_CACERT: CA bundle found, but not helpful |
| 339 | // Different versions of curl have different error messages |
| 340 | // this string should catch them all. |
| 341 | && |
| 342 | false === strpos( $message, 'Problem with the SSL CA cert' ) // cURL CURLE_SSL_CACERT_BADFILE: probably access rights. |
| 343 | ) { |
| 344 | // No, it is not. |
| 345 | return $response; |
| 346 | } |
| 347 | |
| 348 | // Redo the request without SSL certificate verification. |
| 349 | $args['sslverify'] = false; |
| 350 | $response = wp_remote_request( $url, $args ); |
| 351 | |
| 352 | if ( ! is_wp_error( $response ) ) { |
| 353 | // The request went through this time, flag for future fallbacks. |
| 354 | \Jetpack_Options::update_option( 'fallback_no_verify_ssl_certs', time() ); |
| 355 | self::set_time_diff( $response, $set_fallback ); |
| 356 | } |
| 357 | |
| 358 | return $response; |
| 359 | } |
| 360 | |
| 361 | /** |
| 362 | * Sets the time difference for correct signature computation. |
| 363 | * |
| 364 | * @param array|WP_Error $response Response array from `wp_remote_request`, or WP_Error on error. |
| 365 | * @param bool $force_set whether to force setting the time difference. |
| 366 | * @phan-param _WP_Remote_Response_Array|WP_Error $response |
| 367 | */ |
| 368 | public static function set_time_diff( &$response, $force_set = false ) { |
| 369 | $code = wp_remote_retrieve_response_code( $response ); |
| 370 | |
| 371 | // Only trust the Date header on some responses. |
| 372 | if ( 200 != $code && 304 != $code && 400 != $code && 401 != $code ) { // phpcs:ignore Universal.Operators.StrictComparisons.LooseNotEqual |
| 373 | return; |
| 374 | } |
| 375 | |
| 376 | $date = wp_remote_retrieve_header( $response, 'date' ); |
| 377 | if ( ! $date ) { |
| 378 | return; |
| 379 | } |
| 380 | |
| 381 | $time = (int) strtotime( $date ); |
| 382 | if ( 0 >= $time ) { |
| 383 | return; |
| 384 | } |
| 385 | |
| 386 | $time_diff = $time - time(); |
| 387 | |
| 388 | if ( $force_set ) { // During register. |
| 389 | \Jetpack_Options::update_option( 'time_diff', $time_diff ); |
| 390 | } else { // Otherwise. |
| 391 | $old_diff = \Jetpack_Options::get_option( 'time_diff' ); |
| 392 | if ( false === $old_diff || abs( $time_diff - (int) $old_diff ) > 10 ) { |
| 393 | \Jetpack_Options::update_option( 'time_diff', $time_diff ); |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | /** |
| 399 | * Validate and build arguments for a WordPress.com REST API request. |
| 400 | * |
| 401 | * @param string $path REST API path. |
| 402 | * @param string $version REST API version. Default is `2`. |
| 403 | * @param array $args Arguments to {@see WP_Http}. Default is `array()`. |
| 404 | * @param string $base_api_path REST API root. Default is `wpcom`. |
| 405 | * |
| 406 | * @return array Validated arguments. |
| 407 | */ |
| 408 | public static function validate_args_for_wpcom_json_api_request( |
| 409 | $path, |
| 410 | $version = '2', |
| 411 | $args = array(), |
| 412 | $base_api_path = 'wpcom' |
| 413 | ) { |
| 414 | $base_api_path = trim( $base_api_path, '/' ); |
| 415 | $version = ltrim( $version, 'v' ); |
| 416 | $path = ltrim( $path, '/' ); |
| 417 | |
| 418 | $filtered_args = array_intersect_key( |
| 419 | $args, |
| 420 | array( |
| 421 | 'headers' => 'array', |
| 422 | 'method' => 'string', |
| 423 | 'format' => 'string', |
| 424 | 'timeout' => 'int', |
| 425 | 'redirection' => 'int', |
| 426 | 'stream' => 'boolean', |
| 427 | 'filename' => 'string', |
| 428 | 'sslverify' => 'boolean', |
| 429 | ) |
| 430 | ); |
| 431 | |
| 432 | // Use GET by default whereas `remote_request` uses POST. |
| 433 | $request_method = isset( $filtered_args['method'] ) ? strtoupper( $filtered_args['method'] ) : 'GET'; |
| 434 | |
| 435 | $url = sprintf( |
| 436 | '%s/%s/v%s/%s', |
| 437 | Constants::get_constant( 'JETPACK__WPCOM_JSON_API_BASE' ), |
| 438 | $base_api_path, |
| 439 | $version, |
| 440 | $path |
| 441 | ); |
| 442 | |
| 443 | $validated_args = array_merge( |
| 444 | $filtered_args, |
| 445 | array( |
| 446 | 'url' => $url, |
| 447 | 'method' => $request_method, |
| 448 | ) |
| 449 | ); |
| 450 | |
| 451 | return $validated_args; |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * Queries the WordPress.com REST API with a user token. |
| 456 | * |
| 457 | * @param string $path REST API path. |
| 458 | * @param string $version REST API version. Default is `2`. |
| 459 | * @param array $args Arguments to {@see WP_Http}. Default is `array()`. |
| 460 | * @param null|string|array $body Body passed to {@see WP_Http}. Default is `null`. |
| 461 | * @param string $base_api_path REST API root. Default is `wpcom`. |
| 462 | * |
| 463 | * @return array|WP_Error $response Response data, else {@see WP_Error} on failure. |
| 464 | * @phan-return _WP_Remote_Response_Array|WP_Error |
| 465 | */ |
| 466 | public static function wpcom_json_api_request_as_user( |
| 467 | $path, |
| 468 | $version = '2', |
| 469 | $args = array(), |
| 470 | $body = null, |
| 471 | $base_api_path = 'wpcom' |
| 472 | ) { |
| 473 | $args = self::validate_args_for_wpcom_json_api_request( $path, $version, $args, $base_api_path ); |
| 474 | $args['user_id'] = get_current_user_id(); |
| 475 | |
| 476 | if ( isset( $body ) && ! isset( $args['headers'] ) && in_array( $args['method'], array( 'POST', 'PUT', 'PATCH' ), true ) ) { |
| 477 | $args['headers'] = array( 'Content-Type' => 'application/json' ); |
| 478 | } |
| 479 | |
| 480 | if ( isset( $body ) && ! is_string( $body ) ) { |
| 481 | $body = wp_json_encode( $body, JSON_UNESCAPED_SLASHES ); |
| 482 | } |
| 483 | |
| 484 | return self::remote_request( $args, $body ); |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * Query the WordPress.com REST API using the blog token |
| 489 | * |
| 490 | * @param string $path The API endpoint relative path. |
| 491 | * @param string $version The API version. |
| 492 | * @param array $args Request arguments. |
| 493 | * @param array|string|null $body Request body. |
| 494 | * @param string $base_api_path (optional) the API base path override, defaults to 'rest'. |
| 495 | * @return array|WP_Error $response Data. |
| 496 | * @phan-return _WP_Remote_Response_Array|WP_Error |
| 497 | */ |
| 498 | public static function wpcom_json_api_request_as_blog( |
| 499 | $path, |
| 500 | $version = self::WPCOM_JSON_API_VERSION, |
| 501 | $args = array(), |
| 502 | $body = null, |
| 503 | $base_api_path = 'rest' |
| 504 | ) { |
| 505 | $validated_args = self::validate_args_for_wpcom_json_api_request( $path, $version, $args, $base_api_path ); |
| 506 | $validated_args['blog_id'] = (int) \Jetpack_Options::get_option( 'id' ); |
| 507 | |
| 508 | // For Simple sites get the response directly without any HTTP requests. |
| 509 | if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) { |
| 510 | add_filter( 'is_jetpack_authorized_for_site', '__return_true' ); |
| 511 | require_lib( 'wpcom-api-direct' ); |
| 512 | return \WPCOM_API_Direct::do_request( $validated_args, $body ); |
| 513 | } |
| 514 | |
| 515 | return self::remote_request( $validated_args, $body ); |
| 516 | } |
| 517 | |
| 518 | /** |
| 519 | * Takes an array or similar structure and recursively turns all values into strings. This is used to |
| 520 | * make sure that body hashes are made ith the string version, which is what will be seen after a |
| 521 | * server pulls up the data in the $_POST array. |
| 522 | * |
| 523 | * @param mixed $data the data that needs to be stringified. |
| 524 | * |
| 525 | * @return array|string |
| 526 | */ |
| 527 | public static function _stringify_data( $data ) { // phpcs:ignore PSR2.Methods.MethodDeclaration.Underscore |
| 528 | |
| 529 | // Booleans are special, lets just makes them and explicit 1/0 instead of the 0 being an empty string. |
| 530 | if ( is_bool( $data ) ) { |
| 531 | return $data ? '1' : '0'; |
| 532 | } |
| 533 | |
| 534 | // Cast objects into arrays. |
| 535 | if ( is_object( $data ) ) { |
| 536 | $data = (array) $data; |
| 537 | } |
| 538 | |
| 539 | // Non arrays at this point should be just converted to strings. |
| 540 | if ( ! is_array( $data ) ) { |
| 541 | return (string) $data; |
| 542 | } |
| 543 | |
| 544 | foreach ( $data as &$value ) { |
| 545 | $value = self::_stringify_data( $value ); |
| 546 | } |
| 547 | |
| 548 | return $data; |
| 549 | } |
| 550 | } |