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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Json; |
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/** |
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* Json is a helper class providing JSON data encoding and decoding. |
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* It enhances the PHP built-in functions `json_encode()` and `json_decode()` |
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* by throwing exceptions when decoding fails. |
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*/ |
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final class Json |
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{ |
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/** |
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* Encodes the given value into a JSON string. |
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* |
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* Note that data encoded as JSON must be UTF-8 encoded according to the JSON specification. |
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* You must ensure strings passed to this method have proper encoding before passing them. |
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* |
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* @param mixed $value The data to be encoded. |
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* @param int $options The encoding options. For more details please refer to |
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* {@see http://www.php.net/manual/en/function.json-encode.php}. |
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* Default is `JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_THROW_ON_ERROR`. |
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* @param int $depth The maximum depth. |
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* |
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* @throws \JsonException if there is any encoding error. |
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* |
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* @return string The encoding result. |
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*/ |
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public static function encode( |
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$value, |
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int $options = JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_THROW_ON_ERROR, |
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int $depth = 512 |
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): string { |
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$expressions = []; |
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$value = self::processData($value, $expressions, uniqid('', true)); |
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$json = json_encode($value, JSON_THROW_ON_ERROR | $options, $depth); |
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return $expressions === [] ? $json : strtr($json, $expressions); |
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} |
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/** |
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* Encodes the given value into a JSON string HTML-escaping entities so it is safe to be embedded in HTML code. |
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* |
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* Note that data encoded as JSON must be UTF-8 encoded according to the JSON specification. |
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* You must ensure strings passed to this method have proper encoding before passing them. |
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* |
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* @param mixed $value The data to be encoded. |
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* |
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* @throws \JsonException If there is any encoding error. |
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* |
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* @return string The encoding result. |
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*/ |
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public static function htmlEncode($value): string |
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{ |
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return self::encode( |
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$value, |
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JSON_UNESCAPED_UNICODE | JSON_HEX_QUOT | JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_THROW_ON_ERROR |
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); |
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} |
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/** |
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* Decodes the given JSON string into a PHP data structure. |
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* |
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* @param string $json The JSON string to be decoded. |
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* @param bool $asArray Whether to return objects in terms of associative arrays. |
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* @param int $depth The recursion depth. |
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* @param int $options The decode options. |
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* |
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* @throws \JsonException If there is any decoding error. |
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* |
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* @return mixed The PHP data. |
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*/ |
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public static function decode( |
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string $json, |
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bool $asArray = true, |
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int $depth = 512, |
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int $options = JSON_THROW_ON_ERROR |
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) { |
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if ($json === '') { |
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return null; |
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} |
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return json_decode($json, $asArray, $depth, JSON_THROW_ON_ERROR | $options); |
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} |
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/** |
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* Pre-processes the data before sending it to `json_encode()`. |
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* |
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* @param mixed $data The data to be processed. |
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* @param array $expressions collection of JavaScript expressions |
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* @param string $expPrefix a prefix internally used to handle JS expressions |
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* |
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* @return mixed The processed data. |
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*/ |
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private static function processData($data, &$expressions, $expPrefix) |
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{ |
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if (\is_object($data)) { |
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if ($data instanceof JsExpression) { |
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$token = "!{[$expPrefix=" . count($expressions) . ']}!'; |
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$expressions['"' . $token . '"'] = $data->expression; |
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return $token; |
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} |
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if ($data instanceof \JsonSerializable) { |
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return self::processData($data->jsonSerialize(), $expressions, $expPrefix); |
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} |
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if ($data instanceof \DateTimeInterface) { |
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return self::processData((array)$data, $expressions, $expPrefix); |
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} |
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if ($data instanceof \SimpleXMLElement) { |
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$data = (array)$data; |
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} else { |
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$result = []; |
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foreach ($data as $name => $value) { |
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$result[$name] = $value; |
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} |
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$data = $result; |
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} |
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if ($data === []) { |
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return new \stdClass(); |
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} |
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} |
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if (\is_array($data)) { |
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foreach ($data as $key => $value) { |
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if (\is_array($value) || \is_object($value)) { |
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$data[$key] = self::processData($value, $expressions, $expPrefix); |
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} |
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} |
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} |
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return $data; |
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} |
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} |
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yiisoft /
json
