Add error handler

src/Error/ErrorHandler.php

@@ -0,0 +1,51 @@
+<?php
+namespace Tools\Error;
+
+use Cake\Error\ErrorHandler as CoreErrorHandler;
+use Cake\Log\Log;
+use Exception;
+
+/**
+ * Custom ErrorHandler to not mix the 404 exceptions with the rest of "real" errors in the error.log file.
+ *
+ * All you need to do is:
+ * - switch `use Cake\Error\ErrorHandler;` with `use Tools\Error\ErrorHandler;` in your bootstrap
+ * - Make sure you got the 404 log defined either in your app.php or as Log::config() call.
+ *
+ * Example config as scoped one:
+ * - 'className' => 'Cake\Log\Engine\FileLog',
+ * - 'path' => LOGS,
+ * - 'file'=> '404',
+ * - 'levels' => ['error'],
+ * - 'scopes' => ['404']
+ *
+ * If you don't want the errors to also show up in the debug and error log, make sure you set
+ * `'scopes' => false` for those two in your app.php file.
+ */
+class ErrorHandler extends CoreErrorHandler {
+
+	/**
+	 * Handles exception logging
+	 *
+	 * @param \Exception $exception Exception instance.
+	 * @return bool
+	 */
+	protected function _logException(\Exception $exception) {
+		$blacklist = [
+			'Cake\Routing\Exception\MissingControllerException',
+			'Cake\Routing\Exception\MissingActionException',
+			'Cake\Routing\Exception\PrivateActionException',
+			'Cake\Routing\Exception\NotFoundException'];
+		if (isset($this->_options['log404'])) {
+			$blacklist = $this->_options['log404'];
+		}
+
+		if ($blacklist && in_array(get_class($exception), (array)$blacklist)) {
+			$level = LOG_ERR;
+			Log::write($level, $this->_getMessage($exception), ['404']);
+			return;
+		}
+		return parent::_logException($exception);
+	}
+
+}