Add phpstan

Author: donatj

.gitignore

@@ -1,2 +1,3 @@
 /vendor/
-composer.lock
+composer.lock
+*.cache

Makefile

@@ -8,7 +8,7 @@ fix: cbf
 	vendor/bin/php-cs-fixer fix
 
 .PHONY: test
-test: cs
+test: cs phpstan
 	vendor/bin/phpunit
 
 .PHONY: cs
@@ -17,4 +17,8 @@ cs:
 
 .PHONY: cbf
 cbf:
-	vendor/bin/phpcbf
+	vendor/bin/phpcbf
+
+.PHONY: phpstan
+phpstan:
+	vendor/bin/phpstan analyse

composer.json

@@ -10,7 +10,7 @@
 		}
 	],
 	"require": {
-		"php": "^7.1 | ^8.0"
+		"php": "^7.2 | ^8.0"
 	},
 	"autoload": {
 		"psr-4": {
@@ -21,7 +21,8 @@
 		"phpunit/phpunit": "~7.5 | ~9.0",
 		"squizlabs/php_codesniffer": "^3.5",
 		"corpus/coding-standard": "^0.6.0",
-		"friendsofphp/php-cs-fixer": "^2.17"
+		"friendsofphp/php-cs-fixer": "^2.17",
+		"phpstan/phpstan": "^1.12"
 	},
 	"config": {
 		"allow-plugins": {

phpstan.neon

@@ -0,0 +1,5 @@
+parameters:
+	level: 9
+	paths:
+		- src
+	phpVersion: 70200

src/Status.php

@@ -72,6 +72,7 @@ abstract class Status {
 	public const NotExtended                   = 510; // RFC 2774, 7
 	public const NetworkAuthenticationRequired = 511; // RFC 6585, 6
 
+	/** @var array<int,string> */
 	public static $statusText = [
 		self::StatusContinue     => 'Continue',
 		self::SwitchingProtocols => 'Switching Protocols',