diff --git a/mod/network.php b/mod/network.php
index e1c077b6c5..ec87e4c87e 100644
--- a/mod/network.php
+++ b/mod/network.php
@@ -650,7 +650,7 @@ function networkThreadedView(App $a, $update, $parent)
 
 			$sql_post_table .= " INNER JOIN `item` AS `temp1` ON `temp1`.`id` = " . $sql_table . "." . $sql_parent;
 			$sql_extra3 .= " AND (`thread`.`contact-id` IN ($contact_str) ";
-			$sql_extra3 .= " OR (`thread`.`contact-id` = '$contact_str_self' AND `temp1`.`allow_gid` LIKE '" . protect_sprintf('%<' . intval($gid) . '>%') . "' AND `temp1`.`private`))";
+			$sql_extra3 .= " OR (`thread`.`contact-id` = '$contact_str_self' AND `temp1`.`allow_gid` LIKE '" . Strings::protectSprintf('%<' . intval($gid) . '>%') . "' AND `temp1`.`private`))";
 		} else {
 			$sql_extra3 .= " AND false ";
 			info(L10n::t('Group is empty'));
@@ -698,11 +698,11 @@ function networkThreadedView(App $a, $update, $parent)
 	}
 
 	if ($datequery) {
-		$sql_extra3 .= protect_sprintf(sprintf(" AND $sql_table.created <= '%s' ",
+		$sql_extra3 .= Strings::protectSprintf(sprintf(" AND $sql_table.created <= '%s' ",
 				DBA::escape(DateTimeFormat::convert($datequery, 'UTC', date_default_timezone_get()))));
 	}
 	if ($datequery2) {
-		$sql_extra3 .= protect_sprintf(sprintf(" AND $sql_table.created >= '%s' ",
+		$sql_extra3 .= Strings::protectSprintf(sprintf(" AND $sql_table.created >= '%s' ",
 				DBA::escape(DateTimeFormat::convert($datequery2, 'UTC', date_default_timezone_get()))));
 	}
 
diff --git a/mod/profile.php b/mod/profile.php
index d07631dced..f520ef94b7 100644
--- a/mod/profile.php
+++ b/mod/profile.php
@@ -273,19 +273,19 @@ function profile_content(App $a, $update = 0)
 
 		if (!empty($category)) {
 			$sql_post_table = sprintf("INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
-				DBA::escape(protect_sprintf($category)), intval(TERM_OBJ_POST), intval(TERM_CATEGORY), intval($a->profile['profile_uid']));
+				DBA::escape(Strings::protectSprintf($category)), intval(TERM_OBJ_POST), intval(TERM_CATEGORY), intval($a->profile['profile_uid']));
 		}
 
 		if (!empty($hashtags)) {
 			$sql_post_table .= sprintf("INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
-				DBA::escape(protect_sprintf($hashtags)), intval(TERM_OBJ_POST), intval(TERM_HASHTAG), intval($a->profile['profile_uid']));
+				DBA::escape(Strings::protectSprintf($hashtags)), intval(TERM_OBJ_POST), intval(TERM_HASHTAG), intval($a->profile['profile_uid']));
 		}
 
 		if (!empty($datequery)) {
-			$sql_extra2 .= protect_sprintf(sprintf(" AND `thread`.`created` <= '%s' ", DBA::escape(DateTimeFormat::convert($datequery, 'UTC', date_default_timezone_get()))));
+			$sql_extra2 .= Strings::protectSprintf(sprintf(" AND `thread`.`created` <= '%s' ", DBA::escape(DateTimeFormat::convert($datequery, 'UTC', date_default_timezone_get()))));
 		}
 		if (!empty($datequery2)) {
-			$sql_extra2 .= protect_sprintf(sprintf(" AND `thread`.`created` >= '%s' ", DBA::escape(DateTimeFormat::convert($datequery2, 'UTC', date_default_timezone_get()))));
+			$sql_extra2 .= Strings::protectSprintf(sprintf(" AND `thread`.`created` >= '%s' ", DBA::escape(DateTimeFormat::convert($datequery2, 'UTC', date_default_timezone_get()))));
 		}
 
 		// Does the profile page belong to a forum?
diff --git a/src/Module/Contact.php b/src/Module/Contact.php
index 8600b115d6..faf1ecad5f 100644
--- a/src/Module/Contact.php
+++ b/src/Module/Contact.php
@@ -766,7 +766,7 @@ class Contact extends BaseModule
 		if ($search) {
 			$searching = true;
 			$search_hdr = $search;
-			$search_txt = DBA::escape(protect_sprintf(preg_quote($search)));
+			$search_txt = DBA::escape(Strings::protectSprintf(preg_quote($search)));
 			$sql_extra .= " AND (name REGEXP '$search_txt' OR url REGEXP '$search_txt'  OR nick REGEXP '$search_txt') ";
 		}
 
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index a6efeb76a2..96ed32010e 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -241,7 +241,7 @@ class DFRN
 		if (isset($category)) {
 			$sql_post_table = sprintf(
 				"INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
-				DBA::escape(protect_sprintf($category)),
+				DBA::escape(Strings::protectSprintf($category)),
 				intval(TERM_OBJ_POST),
 				intval(TERM_CATEGORY),
 				intval($owner_id)
diff --git a/view/theme/frio/theme.php b/view/theme/frio/theme.php
index 411e143611..6621fd5540 100644
--- a/view/theme/frio/theme.php
+++ b/view/theme/frio/theme.php
@@ -311,7 +311,7 @@ function frio_acl_lookup(App $a, &$results)
 
 	$sql_extra = '';
 	if ($results['search']) {
-		$search_txt = DBA::escape(protect_sprintf(preg_quote($results['search'])));
+		$search_txt = DBA::escape(Strings::protectSprintf(preg_quote($results['search'])));
 		$sql_extra .= " AND (`attag` LIKE '%%" . $search_txt . "%%' OR `name` LIKE '%%" . $search_txt . "%%' OR `nick` LIKE '%%" . $search_txt . "%%') ";
 	}