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<?php declare(strict_types=1); /* * This file is part of PHPUnit. * * (c) Sebastian Bergmann <sebastian@phpunit.de> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace PHPUnit\Util; use const JSON_PRETTY_PRINT; use const JSON_UNESCAPED_SLASHES; use const JSON_UNESCAPED_UNICODE; use function count; use function is_array; use function is_object; use function json_decode; use function json_encode; use function json_last_error; use function ksort; use PHPUnit\Framework\Exception; /** * @internal This class is not covered by the backward compatibility promise for PHPUnit */ final class Json { /** * Prettify json string. * * @throws \PHPUnit\Framework\Exception */ public static function prettify(string $json): string { $decodedJson = json_decode($json, false); if (json_last_error()) { throw new Exception( 'Cannot prettify invalid json' ); } return json_encode($decodedJson, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE); } /** * To allow comparison of JSON strings, first process them into a consistent * format so that they can be compared as strings. * * @return array ($error, $canonicalized_json) The $error parameter is used * to indicate an error decoding the json. This is used to avoid ambiguity * with JSON strings consisting entirely of 'null' or 'false'. */ public static function canonicalize(string $json): array { $decodedJson = json_decode($json); if (json_last_error()) { return [true, null]; } self::recursiveSort($decodedJson); $reencodedJson = json_encode($decodedJson); return [false, $reencodedJson]; } /** * JSON object keys are unordered while PHP array keys are ordered. * * Sort all array keys to ensure both the expected and actual values have * their keys in the same order. */ private static function recursiveSort(&$json): void { if (!is_array($json)) { // If the object is not empty, change it to an associative array // so we can sort the keys (and we will still re-encode it // correctly, since PHP encodes associative arrays as JSON objects.) // But EMPTY objects MUST remain empty objects. (Otherwise we will // re-encode it as a JSON array rather than a JSON object.) // See #2919. if (is_object($json) && count((array) $json) > 0) { $json = (array) $json; } else { return; } } ksort($json); foreach ($json as $key => &$value) { self::recursiveSort($value); } } }
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