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diff --git a/www/wiki/includes/debug/logger/NullSpi.php b/www/wiki/includes/debug/logger/NullSpi.php
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+++ b/www/wiki/includes/debug/logger/NullSpi.php
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+<?php
+/**
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+namespace MediaWiki\Logger;
+
+use Psr\Log\NullLogger;
+
+/**
+ * LoggerFactory service provider that creates \Psr\Log\NullLogger
+ * instances. A NullLogger silently discards all log events sent to it.
+ *
+ * Usage:
+ *
+ *     $wgMWLoggerDefaultSpi = [
+ *         'class' => \MediaWiki\Logger\NullSpi::class,
+ *     ];
+ *
+ * @see \MediaWiki\Logger\LoggerFactory
+ * @since 1.25
+ * @copyright © 2014 Wikimedia Foundation and contributors
+ */
+class NullSpi implements Spi {
+
+	/**
+	 * @var \Psr\Log\NullLogger $singleton
+	 */
+	protected $singleton;
+
+	public function __construct() {
+		$this->singleton = new NullLogger();
+	}
+
+	/**
+	 * Get a logger instance.
+	 *
+	 * @param string $channel Logging channel
+	 * @return \Psr\Log\NullLogger Logger instance
+	 */
+	public function getLogger( $channel ) {
+		return $this->singleton;
+	}
+
+}