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<?php $user = new stdClass(); $user->id = 1; $user->name = 'John Doe'; $foobar = array('foo' => 'bar', 'user' => $user); echo serialize($foobar);
Output for 4.3.0 - 7.1.10
a:2:{s:3:"foo";s:3:"bar";s:4:"user";O:8:"stdClass":2:{s:2:"id";i:1;s:4:"name";s:8:"John Doe";}}