检查Laravel中的请求数组是否为空 [英] Checking if a request array is empty in Laravel

问题描述

我有一个动态生成的表格，该表格为我提供了一系列输入.但是，该数组可能为空，则foreach将失败.

I have a dynamically generated form that gives me an array of inputs. However the array might be empty, then the foreach will fail.

    public function myfunction(Request $request)
    {
    if(isset($request))
     {
       #do something
     }

    }

这显然是行不通的，因为它是一个$ request对象，并且始终处于设置状态.但是我不知道如何检查是否有任何输入.

This obviously doesn't work since it is a $request object and is always set. I have no idea however how to check if there is any input at all.

有什么想法吗?

推荐答案

在安装时，我总是通过在App\Http\Controllers目录中的Controller中添加一个函数来完成此操作.

I always do this with my installations by adding a function to the Controller in the App\Http\Controllers directory.

use Illuminate\Http\Request;
public function hasInput(Request $request)
{
    if($request->has('_token')) {
        return count($request->all()) > 1;
    } else {
        return count($request->all()) > 0;
    }
}

不言自明，如果_token以外的其他输入变量，则返回true；否则，如果没有token并且包含其他变量，则返回true.

Rather self explanatory, return true if other input variables outside of the _token, or return true if no token and contains other variables.

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