Feature: all variables must be camel case - strict

src/WebimpressCodingStandard/Helper/MethodsTrait.php

@@ -263,13 +263,13 @@ private function typesMatch(string $typeHint, string $typeStr) : bool
             return false;
         }
 
-        $fqcnTypeHint = strtolower($this->getFQCN($lowerTypeHint));
+        $fqcnTypeHint = strtolower($this->getFqcn($lowerTypeHint));
         foreach ($types as $key => $type) {
             if ($type === 'null') {
                 continue;
             }
 
-            $types[$key] = strtolower($this->getFQCN($type));
+            $types[$key] = strtolower($this->getFqcn($type));
         }
         $fqcnTypes = implode('|', $types);
 
@@ -279,7 +279,7 @@ private function typesMatch(string $typeHint, string $typeStr) : bool
                     || $fqcnTypeHint . '|null' === $fqcnTypes));
     }
 
-    private function getFQCN(string $class) : string
+    private function getFqcn(string $class) : string
     {
         // It is a simple type
         if (in_array(strtolower($class), $this->simpleReturnTypes, true)) {
@@ -308,10 +308,10 @@ private function isClassName(string $name) : bool
 
         $ns = strtolower($this->currentNamespace);
         $lowerClassName = strtolower($this->className);
-        $lowerFQCN = ($ns ? '\\' . $ns : '') . '\\' . $lowerClassName;
+        $lowerFqcn = ($ns ? '\\' . $ns : '') . '\\' . $lowerClassName;
         $lower = strtolower($name);
 
-        return $lower === $lowerFQCN
+        return $lower === $lowerFqcn
             || $lower === $lowerClassName;
     }
 
@@ -322,10 +322,10 @@ private function isParentClassName(string $name) : bool
         }
 
         $lowerParentClassName = strtolower($this->parentClassName);
-        $lowerFQCN = strtolower($this->getFQCN($lowerParentClassName));
+        $lowerFqcn = strtolower($this->getFqcn($lowerParentClassName));
         $lower = strtolower($name);
 
-        return $lower === $lowerFQCN
+        return $lower === $lowerFqcn
             || $lower === $lowerParentClassName;
     }
 

src/WebimpressCodingStandard/Sniffs/NamingConventions/ValidVariableNameSniff.php

@@ -9,6 +9,7 @@
 use PHP_CodeSniffer\Util\Common;
 
 use function ltrim;
+use function preg_match_all;
 
 use const T_DOUBLE_COLON;
 use const T_WHITESPACE;
@@ -48,8 +49,8 @@ protected function processVariable(File $phpcsFile, $stackPtr) : void
             return; // skip MyClass::$variable, there might be no control over the declaration
         }
 
-        if (! Common::isCamelCaps($varName, false, true, false)) {
-            $error = 'Variable "%s" is not in valid camel caps format';
+        if (! Common::isCamelCaps($varName, false, true, true)) {
+            $error = 'Variable "$%s" is not in valid camel caps format';
             $data = [$varName];
             $phpcsFile->addError($error, $stackPtr, 'NotCamelCaps', $data);
         }
@@ -60,14 +61,33 @@ protected function processVariable(File $phpcsFile, $stackPtr) : void
      */
     protected function processMemberVar(File $phpcsFile, $stackPtr) : void
     {
-        // handled by PSR2.Classes.PropertyDeclaration
+        $tokens = $phpcsFile->getTokens();
+        $varName = ltrim($tokens[$stackPtr]['content'], '$');
+
+        if (! Common::isCamelCaps($varName, false, true, true)) {
+            $error = 'Property "$%s" is not in valid camel caps format';
+            $data = [$varName];
+            $phpcsFile->addError($error, $stackPtr, 'NotCamelCapsProperty', $data);
+        }
     }
 
     /**
      * @param int $stackPtr
      */
     protected function processVariableInString(File $phpcsFile, $stackPtr) : void
     {
-        // handled by Squiz.Strings.DoubleQuoteUsage
+        $tokens = $phpcsFile->getTokens();
+        $content = $tokens[$stackPtr]['content'];
+
+        $pattern = '|(?<!\\\\)(?:\\\\{2})*\${?([a-zA-Z0-9_]+)}?|';
+        preg_match_all($pattern, $content, $matches);
+
+        foreach ($matches[1] ?? [] as $varName) {
+            if (! Common::isCamelCaps($varName, false, true, true)) {
+                $error = 'Variable "$%s" is not in valid camel caps format';
+                $data = [$varName];
+                $phpcsFile->addError($error, $stackPtr, 'NotCamelCapsInString', $data);
+            }
+        }
     }
 }

src/WebimpressCodingStandard/ruleset.xml

@@ -27,6 +27,8 @@
         <!-- Replaced by WebimpressCodingStandard.WhiteSpace.CommaSpacing -->
         <exclude name="Squiz.Functions.FunctionDeclarationArgumentSpacing.SpaceBeforeComma"/>
         <exclude name="Squiz.Functions.FunctionDeclarationArgumentSpacing.NoSpaceBeforeArg"/>
+        <!-- Replaced by WebimpressCodingStandard.NamingConventions.ValidVariableName -->
+        <exclude name="PSR2.Classes.PropertyDeclaration.Underscore"/>
     </rule>
 
     <!-- Generic Rules -->

test/Sniffs/NamingConventions/ValidVariableNameUnitTest.inc

@@ -21,9 +21,14 @@ echo \Library::$_variable;
 echo \Library::$_another_variable;
 
 class Foo {
-    protected $_this_is_not_handled_by_this_sniff;
+    protected $_invalid;
+    protected $userID;
 }
 
-$string = "This $_some_variable is not {$handled_by} this sniff.";
+$string = "This {$_some_variable} is now ${handled_by} this $sniff.";
 $string .= $_some_variable;
 $string .= $camelCase;
+$string .= "{$myIP}";
+
+$userID = 'invalid due to two uppercase characters next to each other';
+$InvalidVariable = "as first letter cannot be uppercase";

test/Sniffs/NamingConventions/ValidVariableNameUnitTest.php

@@ -13,7 +13,13 @@ protected function getErrorList(string $testFile = '') : array
         return [
             15 => 1,
             16 => 1,
-            28 => 1,
+            24 => 1,
+            25 => 1,
+            28 => 2,
+            29 => 1,
+            31 => 1,
+            33 => 1,
+            34 => 1,
         ];
     }