Why can't the Json_encode () function parse a JSON string with Chinese?

Why can't the Json_encode () function parse a JSON string with Chinese?
This will have the value:

$a = ' {' A ': ' www ', ' B ': 2} ';
$arr = Json_decode ($a, true);

This returns null:

$a = ' {' A ': ' Hello ', ' B ': 2} ';
$arr = Json_decode ($a, true);

Why does this happen? How do I parse a JSON string with Chinese?

Share to:

------Solution--------------------
Change the character set to Utf-8 in your editor
------Solution--------------------
File encoding Utf-8 or iconv, turn it yourself.

