JSON generation in PHP

How does PHP generate JSON without unioncode encoding conversion? For example, in json, $ a [& #039; name & #039; & amp; gt; & #039; Zhang San & #039 ;, & #039; age & #039; & amp; gt; 20]; after json_encode & #039; Zhang San & #039; will become & #039; u97asfddd & #039; how can we enable this encoding? How does PHP generate JSON without unioncode encoding conversion?

For example, in json, $ a = ['name' => 'zhang san', 'age' => 20]; after json_encode, 'zhang san' will become
'/U97asfddd/': how can we replace 'zhangsan' with '/u?

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How does PHP generate JSON without unioncode encoding conversion?

For example, in json, $ a = ['name' => 'zhang san', 'age' => 20]; after json_encode, 'zhang san' will become
'/U97asfddd/': how can we replace 'zhangsan' with '/u?

JSON_UNESCAPED_UNICODE can be used only in php5.4 or later versions.

PHPfunction json_encode_wrapper ($result){    if(defined('JSON_UNESCAPED_UNICODE')){        return json_encode($result,JSON_UNESCAPED_UNICODE|JSON_NUMERIC_CHECK);    }else {        return preg_replace(            array("#\\\u([0-9a-f][0-9a-f][0-9a-f][0-9a-f])#ie", "/\"(\d+)\"/",),            array("iconv('UCS-2', 'UTF-8', pack('H4', '\\1'))", "\\1"),            json_encode($result)        );    }}

Http://php.net/json_encode

echo json_encode($arr, JSON_UNESCAPED_UNICODE);