--- report2.php_orig	2020-01-28 10:16:34.000000000 +0200
+++ report2.php	2020-03-19 11:13:22.722679012 +0200
@@ -42,6 +42,7 @@
 	'filter_set' =>		[T_ZBX_STR,			O_OPT,	P_SYS,			null,		null],
 	'from' =>			[T_ZBX_RANGE_TIME,	O_OPT,	P_SYS,			null,		null],
 	'to' =>				[T_ZBX_RANGE_TIME,	O_OPT,	P_SYS,			null,		null],
+	'exportFile' =>         [T_ZBX_STR,     O_OPT,  P_SYS,                  null,           null]
 ];
 check_fields($fields);
 validateTimeSelectorPeriod(getRequest('from'), getRequest('to'));
@@ -167,10 +168,12 @@
 
 	$reportWidget->setControls((new CTag('nav', true,
 		(new CList())
-			->addItem(new CLink($triggerData['hostname'], '?filter_groupid='.$_REQUEST['filter_groupid']))
+			->addItem(new CLink($triggerData['hostname'], (new CUrl('report2.php'))
+				->setArgument('page', CPagerHelper::loadPage('report2.php', null))
+				->getUrl()
+			))
 			->addItem($triggerData['description'])
-		))
-			->setAttribute('aria-label', _('Content controls'))
+		))->setAttribute('aria-label', _('Content controls'))
 	);
 
 	$table = (new CTableInfo())
@@ -182,6 +185,7 @@
 }
 elseif (hasRequest('filter_hostid')) {
 	$reportWidget->setControls((new CForm('get'))
+		->cleanItems()
 		->setAttribute('aria-label', _('Main filter'))
 		->addItem((new CList())
 			->addItem([
@@ -192,6 +196,7 @@
 					AVAILABILITY_REPORT_BY_TEMPLATE => _('By trigger template')
 				])
 			])
+		->addItem(new CSubmit('exportFile', _('Export to CSV')))
 	));
 
 	/*
@@ -456,7 +461,25 @@
 
 	CArrayHelper::sort($triggers, ['host_name', 'description']);
 
-	$paging = getPagingLine($triggers, ZBX_SORT_UP, new CUrl('report2.php'));
+        if(hasRequest('exportFile')) {
+		ob_end_clean();
+        	$csvText = "Host Name Problems Ok\n";
+           	foreach ($triggers as $trigger) {
+		$availability = calculateAvailability($trigger['triggerid'], $data['filter']['timeline']['from_ts'], $data['filter']['timeline']['to_ts']);
+               	$csvText .= $trigger['hosts'][0]['name'].";".$trigger['description'].";".sprintf('%.4f%%', $availability['true']).";".sprintf('%.4f%%', $availability['false'])."\n";
+           	}
+           	$filename = 'temp/report2_'.time().".csv";
+           	
+           	header('Content-Description: File Transfer');
+           	header('Content-Type: application/force-download');
+           	header('Content-Disposition: attachment; filename='.$filename);
+           	die( $csvText);
+       	}
+
+	// pager
+	$page_num = getRequest('page', 1);
+	CPagerHelper::savePage($page['file'], $page_num);
+	$paging = CPagerHelper::paginate($page_num, $triggers, ZBX_SORT_UP, new CUrl('report2.php'));
 
 	foreach ($triggers as $trigger) {
 		$availability = calculateAvailability($trigger['triggerid'], $data['filter']['timeline']['from_ts'],