最近研究了函数计算，很不错的服务，总结一个php存在的一个问题，为以后的小白们避免同样的错误。

<?php
use RingCentral\Psr7\Response;

function initializer($context) {
    echo 'initializing' . PHP_EOL;
}

function handler($request, $context): Response{
    //$body       = $request->getBody()->getContents();
    $queries    = $request->getQueryParams();
    //$method     = $request->getMethod();
    //$headers    = $request->getHeaders();
    //$path       = $request->getAttribute("path");
    //$requestURI = $request->getAttribute("requestURI");
    //$clientIP   = $request->getAttribute("clientIP");
    
    $params['status'] = 0;

    //如何不存在$queries['id']
    //bug无法判断不存在的变量

    if($queries['id']){
      $params['status'] = 1;
    }

    $respHeaders = array('Content-Type' => 'application/json');
    $respBody = json_encode($params);
    return new Response(200, $respHeaders, $respBody);
}

解决方案：

$GLOBALS['queries'] = $queries;
$id = isset($GLOBALS['queries']['id'])?$GLOBALS['queries']['id']:'';

if($id){
    $params['status'] = 1;
}

利用$GLOBALS来解决，isset判断