Add PreformattedEchoHandler

src/Logging/PreformattedEchoHandler.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace SilverStripe\Logging;
+
+use Monolog\Handler\AbstractProcessingHandler;
+
+/**
+ * Echo the output as preformatted HTML, emulating console output in a browser.
+ * Tiding us over until we can properly decoupled web from CLI output.
+ * Do not use this API outside of core modules,
+ * it'll likely be removed as part of a larger refactor.
+ *
+ * See https://github.com/silverstripe/silverstripe-framework/issues/5542
+ *
+ * @experimental
+ */
+class PreformattedEchoHandler extends AbstractProcessingHandler
+{
+
+    /**
+     * @param array $record
+     */
+    protected function write(array $record)
+    {
+        echo sprintf('<pre>%s</pre>', htmlspecialchars($record['formatted'], ENT_QUOTES, 'UTF-8'));
+    }
+}