<?php $db = new pdo('sqlite::memory:'); $db->query('CREATE TABLE IF NOT EXISTS foobar (id INT AUTO INCREMENT, name TEXT)'); $db->query('INSERT INTO foobar VALUES (NULL, "PHP")'); $db->query('INSERT INTO foobar VALUES (NULL, "PHP6")'); $db->sqliteCreateAggregate('testing', function (&$a, $b) { $a .= $b; return $a; }, function (&$v) { return $v; }); foreach ($db->query('SELECT testing(name) FROM foobar') as $row) { var_dump($row); } $db->query('DROP TABLE foobar');