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run code in 200+ php & hhvm versions
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<?php $options = null; if (version_compare(PHP_VERSION, '5.3.3') >= 0) { $options |= JSON_NUMERIC_CHECK; } if (version_compare(PHP_VERSION, '5.4.0') >= 0) { $options |= JSON_UNESCAPED_UNICODE; } $data = json_encode(array('ая' => '19'), $options); var_dump($data);
based on 4gVJu
Output for 5.4.0 - 7.3.1
string(11) "{"ая":19}"
Output for 5.3.3 - 5.3.29
string(19) "{"\u0430\u044f":19}"
Output for 5.3.0 - 5.3.2
string(21) "{"\u0430\u044f":"19"}"
Output for 5.2.0 - 5.2.17
Warning: json_encode() expects exactly 1 parameter, 2 given in /in/efqka on line 10 NULL
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/efqka on line 10
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/efqka on line 10
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/efqka on line 10
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/efqka on line 10