<?php$a = array( 'a' => '你好', 'b' => 'bb');//header('Content-Type:application/json; charset=UTF-8');echo json_encode($a)."\n";function decodeUnicode($str){ return preg_replace_callback('/\\\\u([0-9a-f]{4})/i', create_function( '$matches', 'return mb_convert_encoding(pack("H*", $matches[1]), "UTF-8", "UCS-2BE");' ), $str);}echo decodeUnicode(json_encode($a))."\n";?>参考资料：http://stackoverflow.com/questions/2934563/how-to-decode-unicode-escape-sequences-like-u00ed-to-proper-utf-8-encoded-char
http://php.net/manual/en/function.preg-replace-callback.php
