PhabricatorAuthChallengeGarbageCollector.php
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	<?php

	final class PhabricatorAuthChallengeGarbageCollector
	extends PhabricatorGarbageCollector {

	const COLLECTORCONST = 'auth.challenges';

	public function getCollectorName() {
	return pht('Authentication Challenges');
	}

	public function hasAutomaticPolicy() {
	return true;
	}

	protected function collectGarbage() {
	$challenge_table = new PhabricatorAuthChallenge();
	$conn = $challenge_table->establishConnection('w');

	queryfx(
	$conn,
	'DELETE FROM %R WHERE challengeTTL < UNIX_TIMESTAMP() LIMIT 100',
	$challenge_table);

	return ($conn->getAffectedRows() == 100);
	}

	}