Tp5·请求数据获取

请求的数据，我们可以使用两个助手方法
request()
input()

input()

是一个数组，这包含了请求中的get和post的参数列表

request()

是一个对象，它包含了一个http请求所有的数据。其中包括get & post的数据。包括seesion和cookie等所有数据。

object(think\Request)[2]
  protected 'method' => string 'GET' (length=3)
  protected 'domain' => null
  protected 'url' => string '/admin/news/index.html?page=5' (length=29)
  protected 'baseUrl' => null
  protected 'baseFile' => string '/index.php' (length=10)
  protected 'root' => string '' (length=0)
  protected 'pathinfo' => string 'admin/news/index.html' (length=21)
  protected 'path' => string 'admin/news/index' (length=16)
  protected 'routeInfo' => 
    array (size=0)
      empty
  protected 'env' => null
  protected 'dispatch' => 
    array (size=2)
      'type' => string 'module' (length=6)
      'module' => 
        array (size=3)
          0 => string 'admin' (length=5)
          1 => string 'news' (length=4)
          2 => string 'index' (length=5)
  protected 'module' => string 'admin' (length=5)
  protected 'controller' => string 'News' (length=4)
  protected 'action' => string 'index' (length=5)
  protected 'langset' => string 'zh-cn' (length=5)
  protected 'param' => 
    array (size=1)
      'page' => string '5' (length=1)
  protected 'get' => 
    array (size=1)
      'page' => string '5' (length=1)
  protected 'post' => 
    array (size=0)
      empty
  protected 'request' => 
    array (size=0)
      empty
  protected 'route' => 
    array (size=0)
      empty
  protected 'put' => null
  protected 'session' => 
    array (size=0)
      empty
  protected 'file' => 
    array (size=0)
      empty
  protected 'cookie' => 
    array (size=0)
      empty
  protected 'server' => 
    array (size=35)
      'USER' => string 'liuguoyan' (length=9)
      'HOME' => string '/Users/liuguoyan' (length=16)
      ................
      'PATH_INFO' => string '/admin/news/index.html' (length=22)
  protected 'header' => 
    array (size=11)
      'host' => string 'news.com' (length=8)
      ................
      'content-type' => string '' (length=0)
      'content-length' => string '' (length=0)
  protected 'mimeType' => 
    array (size=12)
      'xml' => string 'application/xml,text/xml,application/x-xml' (length=42)
      ................
  protected 'content' => null
  protected 'filter' => string '' (length=0)
  protected 'bind' => 
    array (size=0)
      empty
  protected 'input' => string '' (length=0)
  protected 'cache' => null
  protected 'isCheckCache' => null
  protected 'mergeParam' => boolean true

request()的数据比较多，我们简略来写了一些。

我们看到request()中，有param & get & post的数组
所以我们可以使用request()->param() & request()->get() & request()->post()来获取到数据。

判断 param & get &post中某个值是否存在

如果要判断数组中的某个值是否存在，我们不可以直接
if(arr['key']))

if(!empty($data['page'])){
            echo $data['page'];
        }else{
            echo "no param.page" ; 
        }