diff --git a/include/api.php b/include/api.php
index 5969ccd5f1..dc5d640487 100644
--- a/include/api.php
+++ b/include/api.php
@@ -2164,10 +2164,10 @@ function api_statuses_mentions($type)
 	// get last network messages
 
 	// params
-	$since_id = $_REQUEST['since_id'] ?? 0;
-	$max_id   = $_REQUEST['max_id']   ?? 0;
-	$count    = $_REQUEST['count']    ?? 20;
-	$page     = $_REQUEST['page']     ?? 1;
+	$since_id = intval($_REQUEST['since_id'] ?? 0);
+	$max_id   = intval($_REQUEST['max_id']   ?? 0);
+	$count    = intval($_REQUEST['count']    ?? 20);
+	$page     = intval($_REQUEST['page']     ?? 1);
 
 	$start = max(0, ($page - 1) * $count);
 
diff --git a/mod/message.php b/mod/message.php
index 80eac343ed..7a8b133f5b 100644
--- a/mod/message.php
+++ b/mod/message.php
@@ -385,7 +385,7 @@ function message_content(App $a)
  * @param int $limit
  * @return array
  */
-function get_messages($uid, $start, $limit)
+function get_messages(int $uid, int $start, int $limit)
 {
 	return DBA::toArray(DBA::p('SELECT
 			m.`id`,
diff --git a/src/Database/DBA.php b/src/Database/DBA.php
index 8b25f617f6..1a7ff3bc54 100644
--- a/src/Database/DBA.php
+++ b/src/Database/DBA.php
@@ -776,6 +776,18 @@ class DBA
 		return DI::dba()->toArray($stmt, $do_close);
 	}
 
+	/**
+	 * Cast field types according to the table definition
+	 *
+	 * @param string $table
+	 * @param array  $fields
+	 * @return array casted fields
+	 */
+	public static function castFields(string $table, array $fields)
+	{
+		return DI::dba()->castFields($table, $fields);
+	}
+
 	/**
 	 * Returns the error number of the last query
 	 *
diff --git a/src/Database/Database.php b/src/Database/Database.php
index 951dd3e116..641ebd3894 100644
--- a/src/Database/Database.php
+++ b/src/Database/Database.php
@@ -928,6 +928,9 @@ class Database
 		switch ($this->driver) {
 			case self::PDO:
 				$columns = $stmt->fetch(PDO::FETCH_ASSOC);
+				if (!empty($stmt->table) && is_array($columns)) {
+					$columns = $this->castFields($stmt->table, $columns);
+				}
 				break;
 			case self::MYSQLI:
 				if (get_class($stmt) == 'mysqli_result') {
@@ -984,6 +987,8 @@ class Database
 			return false;
 		}
 
+		$param = $this->castFields($table, $param);
+
 		$table_string = DBA::buildTableString($table);
 
 		$fields_string = implode(', ', array_map([DBA::class, 'quoteIdentifier'], array_keys($param)));
@@ -1032,6 +1037,8 @@ class Database
 			return false;
 		}
 
+		$param = $this->castFields($table, $param);
+
 		$table_string = DBA::buildTableString($table);
 
 		$fields_string = implode(', ', array_map([DBA::class, 'quoteIdentifier'], array_keys($param)));
@@ -1444,6 +1451,8 @@ class Database
 			return true;
 		}
 
+		$fields = $this->castFields($table, $fields);
+
 		$table_string = DBA::buildTableString($table);
 
 		$condition_string = DBA::buildCondition($condition);
@@ -1552,6 +1561,10 @@ class Database
 
 		$result = $this->p($sql, $condition);
 
+		if (($this->driver == self::PDO) && !empty($result) && is_string($table)) {
+			$result->table = $table;
+		}
+
 		return $result;
 	}
 
@@ -1596,7 +1609,8 @@ class Database
 
 		$row = $this->fetchFirst($sql, $condition);
 
-		return $row['count'];
+		// Ensure to always return either a "null" or a numeric value
+		return is_numeric($row['count']) ? (int)$row['count'] : $row['count'];
 	}
 
 	/**
@@ -1625,6 +1639,71 @@ class Database
 		return $data;
 	}
 
+	/**
+	 * Cast field types according to the table definition
+	 *
+	 * @param string $table
+	 * @param array  $fields
+	 * @return array casted fields
+	 */
+	public function castFields(string $table, array $fields) {
+		// When there is no data, we don't need to do something
+		if (empty($fields)) {
+			return $fields;
+		}
+
+		// We only need to cast fields with PDO
+		if ($this->driver != self::PDO) {
+			return $fields;
+		}
+
+		// We only need to cast when emulating the prepares
+		if (!$this->connection->getAttribute(PDO::ATTR_EMULATE_PREPARES)) {
+			return $fields;
+		}
+
+		$types = [];
+
+		$tables = DBStructure::definition('', false);
+		if (empty($tables[$table])) {
+			// When a matching table wasn't found we check if it is a view
+			$views = View::definition('', false);
+			if (empty($views[$table])) {
+				return $fields;
+			}
+
+			foreach(array_keys($fields) as $field) {
+				if (!empty($views[$table]['fields'][$field])) {
+					$viewdef = $views[$table]['fields'][$field];
+					if (!empty($tables[$viewdef[0]]['fields'][$viewdef[1]]['type'])) {
+						$types[$field] = $tables[$viewdef[0]]['fields'][$viewdef[1]]['type'];
+					}
+				}
+			}
+		} else {
+			foreach ($tables[$table]['fields'] as $field => $definition) {
+				$types[$field] = $definition['type'];
+			}
+		}
+
+		foreach ($fields as $field => $content) {
+			if (is_null($content) || empty($types[$field])) {
+				continue;
+			}
+
+			if ((substr($types[$field], 0, 7) == 'tinyint') || (substr($types[$field], 0, 8) == 'smallint') ||
+				(substr($types[$field], 0, 9) == 'mediumint') || (substr($types[$field], 0, 3) == 'int') ||
+				(substr($types[$field], 0, 6) == 'bigint') || (substr($types[$field], 0, 7) == 'boolean')) {
+				$fields[$field] = (int)$content;
+			}
+			if ((substr($types[$field], 0, 5) == 'float') || (substr($types[$field], 0, 6) == 'double')) {
+				$fields[$field] = (float)$content;
+			}
+		}
+
+		return $fields;	
+	}
+	
 	/**
 	 * Returns the error number of the last query
 	 *
diff --git a/src/Model/Item.php b/src/Model/Item.php
index 36d96cd07c..9fb35ac5d7 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -233,6 +233,8 @@ class Item
 			return $row;
 		}
 
+		$row = DBA::castFields('item', $row);
+
 		// ---------------------- Transform item structure data ----------------------
 
 		// We prefer the data from the user's contact over the public one
@@ -3024,7 +3026,7 @@ class Item
 		return $recipients;
 	}
 
-	public static function expire($uid, $days, $network = "", $force = false)
+	public static function expire(int $uid, int $days, string $network = "", bool $force = false)
 	{
 		if (!$uid || ($days < 1)) {
 			return;
diff --git a/src/Model/Tag.php b/src/Model/Tag.php
index 0ab4b3a49d..2bdbbc8aca 100644
--- a/src/Model/Tag.php
+++ b/src/Model/Tag.php
@@ -517,7 +517,7 @@ class Tag
 	 * @return array
 	 * @throws \Exception
 	 */
-	public static function setGlobalTrendingHashtags(int $period, $limit = 10)
+	public static function setGlobalTrendingHashtags(int $period, int $limit = 10)
 	{
 		$tagsStmt = DBA::p("SELECT `name` AS `term`, COUNT(*) AS `score`
 			FROM `tag-search-view`
@@ -560,7 +560,7 @@ class Tag
 	 * @return array
 	 * @throws \Exception
 	 */
-	public static function setLocalTrendingHashtags(int $period, $limit = 10)
+	public static function setLocalTrendingHashtags(int $period, int $limit = 10)
 	{
 		$tagsStmt = DBA::p("SELECT `name` AS `term`, COUNT(*) AS `score`
 			FROM `tag-search-view`