解决json_encode中文转码问题

function encode_json($str) { 
 return urldecode(json_encode(url_encode($str))); 
} 
function url_encode($str) { 
 if(is_array($str)) { 
 foreach($str as $key=>$value) { 
 $str[urlencode($key)] = url_encode($value); 
 } 
 } else { 
 $str = urlencode($str); 
 } 
 
 return $str; 
}

json_encode($arr,JSON_UNESCAPED_UNICODE);

$data_string=json_encode($para,JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP | JSON_UNESCAPED_UNICODE);