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<?php $params = array( 'foo' => 'bar', 'baz' => 'foobar', ); $params += array( 'foo' => 'baz', 'new' => 'barbaz', ); print_r($params);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [foo] => bar [baz] => foobar [new] => barbaz )