Add psr/log compatibility

src/Monolog/Processor/PsrLogMessageProcessor.php

@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of the Monolog package.
+ *
+ * (c) Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Monolog\Processor;
+
+/**
+ * Processes a record's message according to PSR-3 rules
+ *
+ * It replaces {foo} with the value from $context['foo']
+ *
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ */
+class PsrLogMessageProcessor
+{
+    /**
+     * @param  array $record
+     * @return array
+     */
+    public function __invoke(array $record)
+    {
+        if (false === strpos($record['message'], '{')) {
+            return $record;
+        }
+
+        $replacements = array();
+        foreach ($record['context'] as $key => $val) {
+            $replacements['{'.$key.'}'] = $val;
+        }
+
+        $record['message'] = strtr($record['message'], $replacements);
+
+        return $record;
+    }
+}