Summarize the usage of $request to obtain request information in laravel

The following tutorial column from laravel will summarize the usage of $request in laravel to obtain request information. I hope it will be helpful to friends in need!

Summary of some methods available for $request in laravel
1. Obtaining request methods

$method = $request->method();

2. Detecting requests Method

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

3, get the requested path

$path = $request->path()

4, get the complete url

$url = $request->url();

5, get the requested ip

$ip = $request->ip()

6, get Port

$port = $request->getPort();

7, get parameters

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

8, set default value

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

9, detect request parameters

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

10, get all request parameters

$res = $request->all()

11, extract some parameters

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

12, remove unnecessary parameters

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

13, obtain request header information

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

14, detect files Whether there is upload

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

15, extract the uploaded file

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

16, get cookie

$cookies = $request->cookie();

17, add cookie value

$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'));

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