Bring back support for PHP 5.3

As Parallel Lint supports PHP 5.3 again since [PR 51](php-parallel-lint/PHP-Parallel-Lint#51), it would be helpful for the Highlighter repo to also support PHP 5.3.

This restores the PHP 5.3 minimum version along the same lines as before the version drop in 02b6aa6
The PHP 5.3.2 minimum is in-line with the PHP Console Color minimum version for PHP 5.3.

Includes:
* Enabling a build against PHP 5.3 in the GH Actions workflow.
* Adjusting the `testVersion` for the PHPCompatibility checks to `5.3-` (5.3 and higher).

Author: jrfnl

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        php: ['5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1']
+        php: ['5.3', '5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1']
         experimental: [false]
 
         include:
@@ -40,6 +40,11 @@ jobs:
           coverage: none
           tools: cs2pr
 
+      # Remove the PHPCS standard as it has a minimum PHP requirements of PHP 5.4 and would block install on PHP 5.3.
+      - name: 'Composer: remove PHPCS'
+        if: ${{ matrix.php < 5.4 }}
+        run: composer remove --dev php-parallel-lint/php-code-style --no-update --no-interaction
+
       # Install dependencies and handle caching in one go.
       # @link https://github.com/marketplace/actions/install-composer-dependencies
       - name: Install Composer dependencies - normal

composer.json

@@ -17,9 +17,9 @@
         "psr-4": {"PHP_Parallel_Lint\\PhpConsoleHighlighter\\Test\\": "tests/"}
     },
     "require": {
-        "php": ">=5.4.0",
+        "php": ">=5.3.2",
         "ext-tokenizer": "*",
-        "php-parallel-lint/php-console-color": "^1.0"
+        "php-parallel-lint/php-console-color": "^1.0.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8.36 || ^5.0 || ^6.0 || ^7.0 || ^8.0 || ^9.0",

phpcs.xml.dist

@@ -36,7 +36,7 @@
     -->
 
     <!-- Set the supported PHP versions for PHPCompatibility (included in PHPParallelLint). -->
-    <config name="testVersion" value="5.4-"/>
+    <config name="testVersion" value="5.3-"/>
 
     <rule ref="PHPParallelLint"/>
 

src/Highlighter.php

@@ -46,7 +46,6 @@ class Highlighter
         T_FUNC_C   => T_FUNC_C,
         T_METHOD_C => T_METHOD_C,
         T_NS_C     => T_NS_C,
-        T_TRAIT_C  => T_TRAIT_C,
     );
 
     /** @var array */
@@ -214,6 +213,12 @@ private function getTokenType($arrayToken)
 
         // phpcs:disable PHPCompatibility.Constants.NewConstants -- The new token constants are only used when defined.
 
+        // Traits didn't exist in PHP 5.3 yet, so the trait magic constant needs special casing for PHP >= 5.4.
+        // __TRAIT__ will tokenize as T_STRING in PHP 5.3, so, the end result will be the same cross-version.
+        if (defined('T_TRAIT_C') && $arrayToken[0] === T_TRAIT_C) {
+            return self::TOKEN_DEFAULT;
+        }
+
         // Handle PHP >= 8.0 namespaced name tokens.
         // https://www.php.net/manual/en/migration80.incompatible.php#migration80.incompatible.tokenizer
         if (