introduce php code snifer

composer.json

@@ -62,7 +62,8 @@
         "phpmailer/phpmailer": "6.6.0",
         "chillerlan/php-qrcode": "4.3.3",
         "adhocore/jwt": "1.1.2",
-        "slickdeals/statsd": "3.1.0"
+        "slickdeals/statsd": "3.1.0",
+        "squizlabs/php_codesniffer": "^3.6"
     },
     "repositories": [
         {

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "6764d068d2f6aa5e9eb8befd84c0c2c9",
+    "content-hash": "33d139681a16da8436756e9b5a27f745",
     "packages": [
         {
             "name": "adhocore/jwt",
@@ -1581,6 +1581,62 @@
             },
             "time": "2021-06-04T20:33:46+00:00"
         },
+        {
+            "name": "squizlabs/php_codesniffer",
+            "version": "3.6.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
+                "reference": "5e4e71592f69da17871dba6e80dd51bce74a351a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/5e4e71592f69da17871dba6e80dd51bce74a351a",
+                "reference": "5e4e71592f69da17871dba6e80dd51bce74a351a",
+                "shasum": ""
+            },
+            "require": {
+                "ext-simplexml": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": ">=5.4.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0"
+            },
+            "bin": [
+                "bin/phpcs",
+                "bin/phpcbf"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.x-dev"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Greg Sherwood",
+                    "role": "lead"
+                }
+            ],
+            "description": "PHP_CodeSniffer tokenizes PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.",
+            "homepage": "https://github.com/squizlabs/PHP_CodeSniffer",
+            "keywords": [
+                "phpcs",
+                "standards"
+            ],
+            "support": {
+                "issues": "https://github.com/squizlabs/PHP_CodeSniffer/issues",
+                "source": "https://github.com/squizlabs/PHP_CodeSniffer",
+                "wiki": "https://github.com/squizlabs/PHP_CodeSniffer/wiki"
+            },
+            "time": "2021-12-12T21:44:58+00:00"
+        },
         {
             "name": "symfony/deprecation-contracts",
             "version": "v3.0.1",
@@ -6576,5 +6632,5 @@
     "platform-overrides": {
         "php": "8.0"
     },
-    "plugin-api-version": "2.3.0"
+    "plugin-api-version": "2.2.0"
 }