/**
* 将一个数组打包成一个Key/Value的消息体
*
* @param array $msg
* @return string
*/
public static function toPack($msg)
{
$content = null;
if (is_array($msg) == true) {
foreach ($msg as $key => $value) {
//这里是个约定，当value为null时，抛弃key.
//因此，需要一个空key时候，请将value设置空字符串
if ($value === null) {
continue;
}
//对value是数组的情况进行处理
if (is_array($value) == true) {
$value = self::toPack($value);
$keyvalue_len = strlen($key) + strlen($value) + 2 + 6;
$keyvalue_len = $keyvalue_len | 0x80000000;
} else {
$keyvalue_len = strlen($key) + strlen($value) + 2 + 6;
}
$content .= pack("Nn", $keyvalue_len, strlen($key)) . $key . "" . $value . "";
}
return $content;
} else {
if (is_null($msg) == true) {
return $content;
} else {
self::$errno = ERR_PACKAGE_PACK_BAD_PARAM_TYPE;
self::$error = '参数应该是null或数组';
return false;
}
}
}
