Add null loggers

Jenkinsfile

@@ -3,7 +3,7 @@ pipeline {
     stages {
         stage('Install Composer Dependencies') {
             steps {
-                sh 'rm -rf composer.lock vendor/'
+                sh 'rm -rf vendor/'
                 sh 'composer install'
             }
         }

Swat/SwatError.php

@@ -11,7 +11,7 @@
  * trace parameters. See the class-level documentation of SwatException for
  * details on how this works.
  *
- * @copyright 2006-2016 silverorange
+ * @copyright 2006-2025 silverorange
  * @license   http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
  */
 class SwatError
@@ -80,6 +80,14 @@ class SwatError
      */
     protected static $fatal_severity = E_USER_ERROR;
 
+    /**
+     * Clears all the configured SwatError loggers.
+     */
+    public static function clearLoggers()
+    {
+        self::$loggers = [];
+    }
+
     /**
      * Sets the object that logs SwatError objects when they are processed.
      *

Swat/SwatNullErrorLogger.php

@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * An implementation of SwatErrorLogger that does not log anywhere.
+ *
+ * This logger can be used to avoid conditional statements in your code.
+ *
+ * @copyright 2025 silverorange
+ * @license   http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
+ *
+ * @see       SwatErrorLogger
+ */
+class SwatNullErrorLogger extends SwatErrorLogger
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function log(SwatError $e) {}
+}

Swat/SwatNullExceptionLogger.php

@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * An implementation of SwatExceptionLogger that does not log anywhere.
+ *
+ * This logger can be used to avoid conditional statements in your code.
+ *
+ * @copyright 2025 silverorange
+ * @license   http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
+ *
+ * @see       SwatExceptionLogger
+ */
+class SwatNullExceptionLogger extends SwatExceptionLogger
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function log(SwatException $e) {}
+}

Swat/exceptions/SwatException.php

@@ -32,7 +32,7 @@
  * only filter one parameter. Use multiple <i>@sensitive</i> documentation tags
  * to filter multiple parameters in a single method.
  *
- * @copyright 2004-2016 silverorange
+ * @copyright 2004-2025 silverorange
  * @license   http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
  */
 class SwatException extends Exception
@@ -57,6 +57,14 @@ class SwatException extends Exception
      */
     private $handled = false;
 
+    /**
+     * Clears all the configured SwatException loggers.
+     */
+    public static function clearLoggers()
+    {
+        self::$loggers = [];
+    }
+
     /**
      * Sets the object that logs SwatException objects when they are processed.
      *