php - json_decode 返回 NULL , UTF-8 BOM

Question

我想解码 JSON 数据并使用 json_decode 函数将其存储到数组中，但它返回 NULL 值。我认为这是因为UTF-8 BOM。任何解决方案？我使用带有 xampp 的 Windows7 操作系统。我将编码设置为

header('Content-type:application/json; charset=utf-8');

JSON 数据

{"command":"E101","user_id":"someuser","movie_id":"1","link_id":"2"}

JSON 错误:控制字符错误，可能编码不正确

 $json_errors = array(
     JSON_ERROR_NONE => 'No error has occurred',
     JSON_ERROR_DEPTH => 'The maximum stack depth has been exceeded',
     JSON_ERROR_CTRL_CHAR => 'Control character error, possibly incorrectly encoded',
     JSON_ERROR_SYNTAX => 'Syntax error',
    );
    echo 'Last error : ', $json_errors[json_last_error()], PHP_EOL, PHP_EOL;

如果我解析这个 JSON，没有发生错误

 {"command":"E101","user_id":"someuser","movie_id":"movie_id","link_id":"link_id"}

唯一的区别是我将字符串数据存储到 movie_id 和 link_id 中。为什么会这样？

JSON 数据 Bin2Hex() 7b22636f6d6d616e64223a2245313031222c226d6f7669655f6964223a226d6f7669655f6964222c226c696e6b5f6964223a226c696e6b5f6964227d000

我通过客户端加密 JSON 数据，我在服务器端解密。

这是我的加密函数

    public function ajax_enc($data){

    $vector = "myvector";
    $filter = new Zend_Filter_Encrypt(array('adapter' => 'mcrypt', 'key' => $this->_AJAXKEY));
    $filter->setVector($vector);
    $encrypted = $filter->filter($data);
    // bin2hex for user use case     
    return bin2hex($encrypted); // rawurlencode(..) works

    }

解密

public function ajax_dec($data)
{
$vector = "myvector";
$filter = new Zend_Filter_Decrypt(array('adapter' => 'mcrypt', 'key' => $this->_AJAXKEY ));
$filter->setVector($vector);
$decoded = pack('H*', $data);
$decrypted = $filter->filter($decoded);
return $decrypted;
}

Answer 1

您的解密显然在字符串末尾留下了一堆填充 NUL 字节。

修复您的解密机制或修剪它们:trim($json, "\x0")