diff --git a/classes/pref/feeds.php b/classes/pref/feeds.php
index ce2d321bd..3d633a378 100755
--- a/classes/pref/feeds.php
+++ b/classes/pref/feeds.php
@@ -1325,7 +1325,7 @@ class Pref_Feeds extends Handler_Protected {
 			</button>
 
 			<label class='checkbox'>
-				<?php print_checkbox("include_settings", true, "1", "") ?>
+				<?= \Controls\checkbox_tag("include_settings", true, "1") ?>
 				<?= __("Include settings") ?>
 			</label>
 		</form>
diff --git a/classes/pref/filters.php b/classes/pref/filters.php
index e9c58cc3e..bc3099e77 100755
--- a/classes/pref/filters.php
+++ b/classes/pref/filters.php
@@ -818,7 +818,7 @@ class Pref_Filters extends Handler_Protected {
 
 		print "<fieldset>";
 		print "<span id='filterDlg_feeds'>";
-		print_feed_multi_select("feed_id",
+		$this->feed_multi_select("feed_id",
 			$feed_id,
 			'style="width : 500px; height : 300px" dojoType="dijit.form.MultiSelect"');
 		print "</span>";
@@ -1070,4 +1070,107 @@ class Pref_Filters extends Handler_Protected {
 
 		$this->pdo->commit();
 	}
+
+	private function feed_multi_select($id, $default_ids = [],
+						   $attributes = "", $include_all_feeds = true,
+						   $root_id = null, $nest_level = 0) {
+
+	$pdo = Db::pdo();
+
+	//	print_r(in_array("CAT:6",$default_ids));
+
+	if (!$root_id) {
+		print "<select multiple=\true\" id=\"$id\" name=\"$id\" $attributes>";
+		if ($include_all_feeds) {
+			$is_selected = (in_array("0", $default_ids)) ? "selected=\"1\"" : "";
+			print "<option $is_selected value=\"0\">".__('All feeds')."</option>";
+		}
+	}
+
+	if (get_pref('ENABLE_FEED_CATS')) {
+
+		if (!$root_id) $root_id = null;
+
+		$sth = $pdo->prepare("SELECT id,title,
+				(SELECT COUNT(id) FROM ttrss_feed_categories AS c2 WHERE
+					c2.parent_cat = ttrss_feed_categories.id) AS num_children
+				FROM ttrss_feed_categories
+				WHERE owner_uid = :uid AND
+				(parent_cat = :root_id OR (:root_id IS NULL AND parent_cat IS NULL)) ORDER BY title");
+
+		$sth->execute([":uid" => $_SESSION['uid'], ":root_id" => $root_id]);
+
+		while ($line = $sth->fetch()) {
+
+			for ($i = 0; $i < $nest_level; $i++)
+				$line["title"] = " " . $line["title"];
+
+			$is_selected = in_array("CAT:".$line["id"], $default_ids) ? "selected=\"1\"" : "";
+
+			printf("<option $is_selected value='CAT:%d'>%s</option>",
+				$line["id"], htmlspecialchars($line["title"]));
+
+			if ($line["num_children"] > 0)
+				$this->feed_multi_select($id, $default_ids, $attributes,
+					$include_all_feeds, $line["id"], $nest_level+1);
+
+			$f_sth = $pdo->prepare("SELECT id,title FROM ttrss_feeds
+					WHERE cat_id = ? AND owner_uid = ? ORDER BY title");
+
+			$f_sth->execute([$line['id'], $_SESSION['uid']]);
+
+			while ($fline = $f_sth->fetch()) {
+				$is_selected = (in_array($fline["id"], $default_ids)) ? "selected=\"1\"" : "";
+
+				$fline["title"] = " " . $fline["title"];
+
+				for ($i = 0; $i < $nest_level; $i++)
+					$fline["title"] = " " . $fline["title"];
+
+				printf("<option $is_selected value='%d'>%s</option>",
+					$fline["id"], htmlspecialchars($fline["title"]));
+			}
+		}
+
+		if (!$root_id) {
+			$is_selected = in_array("CAT:0", $default_ids) ? "selected=\"1\"" : "";
+
+			printf("<option $is_selected value='CAT:0'>%s</option>",
+				__("Uncategorized"));
+
+			$f_sth = $pdo->prepare("SELECT id,title FROM ttrss_feeds
+					WHERE cat_id IS NULL AND owner_uid = ? ORDER BY title");
+			$f_sth->execute([$_SESSION['uid']]);
+
+			while ($fline = $f_sth->fetch()) {
+				$is_selected = in_array($fline["id"], $default_ids) ? "selected=\"1\"" : "";
+
+				$fline["title"] = " " . $fline["title"];
+
+				for ($i = 0; $i < $nest_level; $i++)
+					$fline["title"] = " " . $fline["title"];
+
+				printf("<option $is_selected value='%d'>%s</option>",
+					$fline["id"], htmlspecialchars($fline["title"]));
+			}
+		}
+
+	} else {
+		$sth = $pdo->prepare("SELECT id,title FROM ttrss_feeds
+				WHERE owner_uid = ? ORDER BY title");
+		$sth->execute([$_SESSION['uid']]);
+
+		while ($line = $sth->fetch()) {
+
+			$is_selected = (in_array($line["id"], $default_ids)) ? "selected=\"1\"" : "";
+
+			printf("<option $is_selected value='%d'>%s</option>",
+				$line["id"], htmlspecialchars($line["title"]));
+		}
+	}
+
+	if (!$root_id) {
+		print "</select>";
+	}
+}
 }
diff --git a/plugins/af_proxy_http/init.php b/plugins/af_proxy_http/init.php
index b82999281..79d2f5294 100644
--- a/plugins/af_proxy_http/init.php
+++ b/plugins/af_proxy_http/init.php
@@ -222,11 +222,13 @@ class Af_Proxy_Http extends Plugin {
 		print \Controls\hidden_tag("method", "save");
 		print \Controls\hidden_tag("plugin", "af_proxy_http");
 
-		$proxy_all = $this->host->get($this, "proxy_all");
-		print_checkbox("proxy_all", $proxy_all);
+		$proxy_all = sql_bool_to_bool($this->host->get($this, "proxy_all"));
+		print \Controls\checkbox_tag("proxy_all", $proxy_all);
 		print "&nbsp;<label for=\"proxy_all\">" . __("Enable proxy for all remote images.") . "</label><br/>";
 
-		print "<p>"; print_button("submit", __("Save"));
+		print "<hr/>";
+
+		print \Controls\submit_tag(__("Save"));
 
 		print "</form>";
 
@@ -234,7 +236,7 @@ class Af_Proxy_Http extends Plugin {
 	}
 
 	function save() {
-		$proxy_all = checkbox_to_sql_bool($_POST["proxy_all"]);
+		$proxy_all = checkbox_to_sql_bool($_POST["proxy_all"] ?? "");
 
 		$this->host->set($this, "proxy_all", $proxy_all);
 
diff --git a/plugins/af_psql_trgm/init.php b/plugins/af_psql_trgm/init.php
index 715e63927..3662e490a 100644
--- a/plugins/af_psql_trgm/init.php
+++ b/plugins/af_psql_trgm/init.php
@@ -139,7 +139,7 @@ class Af_Psql_Trgm extends Plugin {
 
 			$similarity = $this->host->get($this, "similarity", $this->default_similarity);
 			$min_title_length = $this->host->get($this, "min_title_length", $this->default_min_length);
-			$enable_globally = $this->host->get($this, "enable_globally");
+			$enable_globally = sql_bool_to_bool($this->host->get($this, "enable_globally"));
 
 			print "<form dojoType=\"dijit.form.Form\">";
 
@@ -186,13 +186,14 @@ class Af_Psql_Trgm extends Plugin {
 			print "</fieldset><fieldset>";
 
 			print "<label class='checkbox'>";
-			print_checkbox("enable_globally", $enable_globally);
+			print \Controls\checkbox_tag("enable_globally", $enable_globally);
 			print " " . __("Enable for all feeds:");
 			print "</label>";
 
 			print "</fieldset>";
 
-			print_button("submit", __("Save"), "class='alt-primary'");
+			print "<hr/>";
+			print \Controls\submit_tag(__("Save"));
 			print "</form>";
 
 			/* cleanup */
@@ -202,6 +203,7 @@ class Af_Psql_Trgm extends Plugin {
 			$this->host->set($this, "enabled_feeds", $enabled_feeds);
 
 			if (count($enabled_feeds) > 0) {
+				print "<hr/>";
 				print "<h3>" . __("Currently enabled for (click to edit):") . "</h3>";
 
 				print "<ul class=\"panel panel-scrollable list list-unstyled\">";
diff --git a/plugins/af_readability/init.php b/plugins/af_readability/init.php
index 435864c21..b9c4e252e 100755
--- a/plugins/af_readability/init.php
+++ b/plugins/af_readability/init.php
@@ -18,7 +18,7 @@ class Af_Readability extends Plugin {
 	}
 
 	function save() {
-		$enable_share_anything = checkbox_to_sql_bool($_POST["enable_share_anything"]);
+		$enable_share_anything = checkbox_to_sql_bool($_POST["enable_share_anything"] ?? "");
 
 		$this->host->set($this, "enable_share_anything", $enable_share_anything);
 
@@ -29,11 +29,6 @@ class Af_Readability extends Plugin {
 	{
 		$this->host = $host;
 
-		if (version_compare(PHP_VERSION, '7.0.0', '<')) {
-			user_error("af_readability requires PHP 7.0", E_USER_WARNING);
-			return;
-		}
-
 		$host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
 		$host->add_hook($host::HOOK_PREFS_TAB, $this);
 		$host->add_hook($host::HOOK_PREFS_EDIT_FEED, $this);
@@ -91,16 +86,18 @@ class Af_Readability extends Plugin {
 			print \Controls\hidden_tag("method", "save");
 			print \Controls\hidden_tag("plugin", "af_readability");
 
-			$enable_share_anything = $this->host->get($this, "enable_share_anything");
+			$enable_share_anything = sql_bool_to_bool($this->host->get($this, "enable_share_anything"));
 
 			print "<fieldset>";
 			print "<label class='checkbox'> ";
-			print_checkbox("enable_share_anything", $enable_share_anything);
+			print \Controls\checkbox_tag("enable_share_anything", $enable_share_anything);
 			print " " . __("Provide full-text services to core code (bookmarklets) and other plugins");
 			print "</label>";
 			print "</fieldset>";
 
-			print_button("submit", __("Save"), "class='alt-primary'");
+			print "<hr/>";
+
+			print \Controls\submit_tag(__("Save"));
 			print "</form>";
 
 			/* cleanup */
@@ -114,6 +111,7 @@ class Af_Readability extends Plugin {
 			$this->host->set($this, "append_feeds", $append_feeds);
 
 			if (count($enabled_feeds) > 0) {
+				print "<hr/>";
 				print "<h3>" . __("Currently enabled for (click to edit):") . "</h3>";
 
 				print "<ul class='panel panel-scrollable list list-unstyled'>";
diff --git a/plugins/af_redditimgur/init.php b/plugins/af_redditimgur/init.php
index b9891ea03..1c520b7ed 100755
--- a/plugins/af_redditimgur/init.php
+++ b/plugins/af_redditimgur/init.php
@@ -64,32 +64,33 @@ class Af_RedditImgur extends Plugin {
 
 		print "<fieldset class='narrow'>";
 		print "<label class='checkbox'>";
-		print_checkbox("enable_readability", $enable_readability);
+		print \Controls\checkbox_tag("enable_readability", $enable_readability);
 		print " " . __("Extract missing content using Readability (requires af_readability)") . "</label>";
 		print "</fieldset>";
 
 		print "<fieldset class='narrow'>";
 		print "<label class='checkbox'>";
-		print_checkbox("enable_content_dupcheck", $enable_content_dupcheck);
+		print \Controls\checkbox_tag("enable_content_dupcheck", $enable_content_dupcheck);
 		print " " . __("Enable additional duplicate checking") . "</label>";
 		print "</fieldset>";
 
 		print "<fieldset class='narrow'>";
 		print "<label class='checkbox'>";
-		print_checkbox("reddit_to_teddit", $reddit_to_teddit);
+		print \Controls\checkbox_tag("reddit_to_teddit", $reddit_to_teddit);
 		print " " . T_sprintf("Rewrite Reddit URLs to %s",
 			"<a target=\"_blank\" href=\"https://teddit.net/about\">Teddit</a>") . "</label>";
 
-		print_button("submit", __("Save"), 'class="alt-primary"');
+		print "<hr/>";
+		print \Controls\submit_tag(__("Save"));
 		print "</form>";
 
 		print "</div>";
 	}
 
 	function save() {
-		$enable_readability = checkbox_to_sql_bool($_POST["enable_readability"]);
-		$enable_content_dupcheck = checkbox_to_sql_bool($_POST["enable_content_dupcheck"]);
-		$reddit_to_teddit = checkbox_to_sql_bool($_POST["reddit_to_teddit"]);
+		$enable_readability = checkbox_to_sql_bool($_POST["enable_readability"] ?? "");
+		$enable_content_dupcheck = checkbox_to_sql_bool($_POST["enable_content_dupcheck"] ?? "");
+		$reddit_to_teddit = checkbox_to_sql_bool($_POST["reddit_to_teddit"] ?? "");
 
 		$this->host->set($this, "enable_readability", $enable_readability, false);
 		$this->host->set($this, "reddit_to_teddit", $reddit_to_teddit, false);