See if this works better

requirements.php

@@ -28,12 +28,15 @@
  */
 function checkRequirements()
 {
+    // TODO: revise when addressing #184.
+    $exitCode = 8;
+
     // Check the PHP version.
     // Note: the PHP_VERSION_ID constant is only available as of PHP 5.2.7, but considering the
     // previous PHPCS major (3.x) already has a PHP 5.4 minimum requirement, I consider that acceptable. [JRF]
     if (PHP_VERSION_ID < 70200) {
-        $error = 'ERROR: PHP_CodeSniffer requires PHP version 7.2.0 or greater.'.PHP_EOL;
-        exit($error);
+        echo 'ERROR: PHP_CodeSniffer requires PHP version 7.2.0 or greater.'.PHP_EOL;
+        exit($exitCode);
     }
 
     $requiredExtensions = array(
@@ -63,7 +66,7 @@ function checkRequirements()
         }
 
         $error = 'ERROR: PHP_CodeSniffer requires the %s extensions to be enabled. Please enable %s.'.PHP_EOL;
-        $error = sprintf($error, $required, $missing);
-        exit($error);
+        printf($error, $required, $missing);
+        exit($exitCode);
     }
 }