总结laravel中$request获取请求信息用法

$method = $request->method();

$res = $request->isMethod('post')

$path = $request->path()

$url = $request->url();

$ip = $request->ip()

$port = $request->getPort();

$name = $request->input('name')

$res = $request->input('name','10')

$res = $request->has('name')

$res = $request->all()

$res = $request->only(['username','password'])

$res = $request->except(['username','password'])

$res = $request->header('Connection')

$res = $request->hasFile('cover')

$res = $request->file('file');

$cookies = $request->cookie();

$response->withCookie(cookie('cookie','learn-laravel',3));  
//第一个参数是cookie名，第二个参数是cookie值，第三个参数是有效期（分钟）.
$response->withCookie(cookie()->forever('cookie-name','cookie-value'));