如何修复警告JSON_BIGINT_AS_STRING未实现？

Question

Looking on my Apache error log file, I checked this warning:

PHP Warning:  json_decode(): option JSON_BIGINT_AS_STRING not implemented in /../codebird.php on line 2517

It's referred to a script that I use to auto-post on Twitter from my blog.

This is the guilty function:

  protected function _parseApiReply($reply)
  {
    $need_array = $this->_return_format === CODEBIRD_RETURNFORMAT_ARRAY;
    if ($reply === '[]') {
      switch ($this->_return_format) {
        case CODEBIRD_RETURNFORMAT_ARRAY:
          return [];
        case CODEBIRD_RETURNFORMAT_JSON:
          return '{}';
        case CODEBIRD_RETURNFORMAT_OBJECT:
          return new \stdClass;
      }
    }
    if (! $parsed = json_decode($reply, $need_array, 512, JSON_BIGINT_AS_STRING)) {
      if ($reply) {
        // assume query format
        $reply = explode('&', $reply);
        foreach ($reply as $element) {
          if (stristr($element, '=')) {
            list($key, $value) = explode('=', $element, 2);
            $parsed[$key] = $value;
          } else {
            $parsed['message'] = $element;
          }
        }
      }
      $reply = json_encode($parsed);
    }
    switch ($this->_return_format) {
      case CODEBIRD_RETURNFORMAT_ARRAY:
        return $parsed;
      case CODEBIRD_RETURNFORMAT_JSON:
        return $reply;
      case CODEBIRD_RETURNFORMAT_OBJECT:
        return (object) $parsed;
    }
    return $parsed;
  }
}

Why if the title is too long I'm getting this warning and it doesn't post on Twitter?

P.S.

I have installed PHP 5.5.9 but the problem still the same.

Answer 1

The JSON_BIGINT_AS_STRING option has only been available since PHP 5.4. You can remove it, but if the numbers contained in your JSON response are too big they will overflow.

Looking into this further, it appears that there were some problems with JSON's license that have resulted in Debian-based distributions not providing packages for the standard JSON extension. They replace it with a mostly-compatible version that defines a constant JSON_C_VERSION that can be checked for:

if (defined("JSON_C_VERSION") || version_compare(PHP_VERSION, '5.4.0', '<')) {
    json_decode($reply, $need_array, 512);
} else {
    json_decode($reply, $need_array, 512, JSON_BIGINT_AS_STRING);
}

Or, just remove the fourth parameter. I've always used Scientific Linux which is a RHEL distro, so had never come across this issue before.