fix php warnings

Zotlabs/Module/Help.php

@@ -17,6 +17,8 @@ class Help extends \Zotlabs\Web\Controller {
 	function get() {
 		nav_set_selected('Help');
 
+		$o = '';
+
 		if(isset($_REQUEST['search']) && $_REQUEST['search']) {
 			$o .= '<div id="help-content" class="generic-content-wrapper">';
 			$o .= '<div class="section-title-wrapper">';

Zotlabs/Module/Search.php

@@ -33,7 +33,7 @@ class Search extends Controller {
 		require_once('include/security.php');
 
 
-		$format = (($_REQUEST['format']) ? $_REQUEST['format'] : '');
+		$format = $_REQUEST['format'] ?? '';
 		if ($format !== '') {
 			$update = $load = 1;
 		}

include/help.php

@@ -248,7 +248,7 @@ function search_doc_files($s) {
 		$r[$x]['text'] = substr($r[$x]['body'], $start, $dislen);
 
 		$r[$x]['rank'] = 0;
-		if($r[$x]['term']) {
+		if(isset($r[$x]['term'])) {
 			foreach($r[$x]['term'] as $t) {
 				if(stristr($t['term'],$s)) {
 					$r[$x]['rank'] ++;