PHP：Laravel获取请求头header

请求，携带了自定义的请求头

GET http://localhost:8081/test
Content-Type: application/json; charset=utf-8
X-Platform: www
X-Version: 0.0.1

路由1

如果直接取header，不传入参数，会取出所有header，而且是一个数组

Route::get('/test', function (\Illuminate\Http\Request $request) {
    
    
    $headers = $request->header();

    return response()->json($headers);
});

返回结果

{
    
    
  "content-type": [
    "application\/json; charset=utf-8"
  ],
  "x-platform": [
    "www"
  ],
  "x-version": [
    "0.0.1"
  ],
  "user-agent": [
    "Apache-HttpClient\/4.5.10 (Java\/11.0.6)"
  ],
  
}

路由2

传入X-Version，此时只能用小写x-version 获取

Route::get('/test', function (\Illuminate\Http\Request $request) {
    
    
    $headers = $request->header();

    return response()->json($headers['x-version']);
});

[
  "0.0.1"
]

路由3

这应该是正常的获取方式

Route::get('/test', function (\Illuminate\Http\Request $request) {
    
    
    $version = $request->header('X-Version');

    return response()->json([
        'version' => $version
    ]);
});

返回结果

{
    
    
  "version": "0.0.1"
}