1: <?php
 2: 
 3: /**
 4:  * This file is part of the Nette Framework (https://nette.org)
 5:  * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 6:  */
 7: 
 8: namespace Nette\Utils;
 9: 
10: use Nette;
11: 
12: 
13: /**
14:  * JSON encoder and decoder.
15:  */
16: class Json
17: {
18:     use Nette\StaticClass;
19: 
20:     const FORCE_ARRAY = 0b0001;
21: 
22:     const PRETTY = 0b0010;
23: 
24: 
25:     /**
26:      * Returns the JSON representation of a value.
27:      * @param  mixed
28:      * @param  int  accepts Json::PRETTY
29:      * @return string
30:      */
31:     public static function encode($value, $options = 0)
32:     {
33:         $flags = JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES
34:             | ($options & self::PRETTY ? JSON_PRETTY_PRINT : 0)
35:             | (defined('JSON_PRESERVE_ZERO_FRACTION') ? JSON_PRESERVE_ZERO_FRACTION : 0); // since PHP 5.6.6 & PECL JSON-C 1.3.7
36: 
37:         $json = json_encode($value, $flags);
38:         if ($error = json_last_error()) {
39:             throw new JsonException(json_last_error_msg(), $error);
40:         }
41: 
42:         if (PHP_VERSION_ID < 70100) {
43:             $json = str_replace(["\xe2\x80\xa8", "\xe2\x80\xa9"], ['\u2028', '\u2029'], $json);
44:         }
45: 
46:         return $json;
47:     }
48: 
49: 
50:     /**
51:      * Decodes a JSON string.
52:      * @param  string
53:      * @param  int  accepts Json::FORCE_ARRAY
54:      * @return mixed
55:      */
56:     public static function decode($json, $options = 0)
57:     {
58:         $forceArray = (bool) ($options & self::FORCE_ARRAY);
59:         $flags = JSON_BIGINT_AS_STRING;
60: 
61:         if (PHP_VERSION_ID < 70000) {
62:             $json = (string) $json;
63:             if ($json === '') {
64:                 throw new JsonException('Syntax error');
65:             } elseif (!$forceArray && preg_match('#(?<=[^\\\\]")\\\\u0000(?:[^"\\\\]|\\\\.)*+"\s*+:#', $json)) {
66:                 throw new JsonException('The decoded property name is invalid'); // fatal error when object key starts with \u0000
67:             } elseif (defined('JSON_C_VERSION') && !preg_match('##u', $json)) {
68:                 throw new JsonException('Invalid UTF-8 sequence', 5);
69:             } elseif (defined('JSON_C_VERSION') && PHP_INT_SIZE === 8) {
70:                 $flags &= ~JSON_BIGINT_AS_STRING; // not implemented in PECL JSON-C 1.3.2 for 64bit systems
71:             }
72:         }
73: 
74:         $value = json_decode($json, $forceArray, 512, $flags);
75:         if ($error = json_last_error()) {
76:             throw new JsonException(json_last_error_msg(), $error);
77:         }
78: 
79:         return $value;
80:     }
81: }
82: