Introduce squizlabs/php_codesniffer

Signed-off-by: Jack Cherng <jfcherng@gmail.com>

Author: jfcherng

composer.json

@@ -26,7 +26,8 @@
     "require": {
         "php": "^7.1.3",
         "jfcherng/php-mb-string": "^1.3",
-        "jfcherng/php-sequence-matcher": "^2.0"
+        "jfcherng/php-sequence-matcher": "^2.0",
+        "squizlabs/php_codesniffer": "^3.4"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.14.1",
@@ -38,7 +39,8 @@
     },
     "scripts": {
         "analyze": [
-            "phan --color"
+            "phan --color",
+            "phpcs --colors -n"
         ],
         "fix": [
             "php-cs-fixer fix --verbose"

composer.lock

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<ruleset name="php-diff">
+    <description>php-diff</description>
+
+    <!-- <arg name="report" value="summary" /> -->
+    <!-- <arg name="colors" /> -->
+    <arg value="sp" />
+
+    <file>./src/</file>
+
+    <exclude-pattern>*/tests/*</exclude-pattern>
+
+    <rule ref="PSR1" />
+    <rule ref="PSR2">
+        <!-- hmm... multiline IF statement -->
+        <exclude name="PSR2.ControlStructures.ControlStructureSpacing.SpacingAfterOpenBrace" />
+    </rule>
+</ruleset>