the whole shebang

vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Log/DebugLoggerInterface.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\Log;
+
+/**
+ * DebugLoggerInterface.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface DebugLoggerInterface
+{
+    /**
+     * Returns an array of logs.
+     *
+     * A log is an array with the following mandatory keys:
+     * timestamp, message, priority, and priorityName.
+     * It can also have an optional context key containing an array.
+     *
+     * @return array An array of logs
+     */
+    public function getLogs();
+
+    /**
+     * Returns the number of errors.
+     *
+     * @return integer The number of errors
+     */
+    public function countErrors();
+}

vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Log/LoggerInterface.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\Log;
+
+use Psr\Log\LoggerInterface as PsrLogger;
+
+/**
+ * LoggerInterface.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 2.2, to be removed in 3.0. Type-hint \Psr\Log\LoggerInterface instead.
+ * @api
+ */
+interface LoggerInterface extends PsrLogger
+{
+    /**
+     * @api
+     * @deprecated since 2.2, to be removed in 3.0. Use emergency() which is PSR-3 compatible.
+     */
+    public function emerg($message, array $context = array());
+
+    /**
+     * @api
+     * @deprecated since 2.2, to be removed in 3.0. Use critical() which is PSR-3 compatible.
+     */
+    public function crit($message, array $context = array());
+
+    /**
+     * @api
+     * @deprecated since 2.2, to be removed in 3.0. Use error() which is PSR-3 compatible.
+     */
+    public function err($message, array $context = array());
+
+    /**
+     * @api
+     * @deprecated since 2.2, to be removed in 3.0. Use warning() which is PSR-3 compatible.
+     */
+    public function warn($message, array $context = array());
+}

vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Log/NullLogger.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\Log;
+
+use Psr\Log\NullLogger as PsrNullLogger;
+
+/**
+ * NullLogger.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @api
+ */
+class NullLogger extends PsrNullLogger implements LoggerInterface
+{
+    /**
+     * @api
+     * @deprecated since 2.2, to be removed in 3.0. Use emergency() which is PSR-3 compatible.
+     */
+    public function emerg($message, array $context = array())
+    {
+    }
+
+    /**
+     * @api
+     * @deprecated since 2.2, to be removed in 3.0. Use critical() which is PSR-3 compatible.
+     */
+    public function crit($message, array $context = array())
+    {
+    }
+
+    /**
+     * @api
+     * @deprecated since 2.2, to be removed in 3.0. Use error() which is PSR-3 compatible.
+     */
+    public function err($message, array $context = array())
+    {
+    }
+
+    /**
+     * @api
+     * @deprecated since 2.2, to be removed in 3.0. Use warning() which is PSR-3 compatible.
+     */
+    public function warn($message, array $context = array())
+    {
+    }
+}