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<?php $f = array('first' => '1', 0 => 0, 2 => 2); list($data['foo']) = $f; var_export($data);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array ( 'foo' => 0, )