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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);
Output for git.master, git.master_jit, rfc.property-hooks
string(11) "{"ая":19}"

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