Prices after applying discount (Pass by Value): Array ( [0] => Array ( [instrument] => Piano [price] => 2700 ) [1] => Array ( [instrument] => Guitar [price] => 720 ) [2] => Array ( [instrument] => Violin [price] => 1080 ) [3] => Array ( [instrument] => Flute [price] => 450 ) [4] => Array ( [instrument] => Drum Set [price] => 1350 ) ) Prices after applying discount (Pass by Reference): Array ( [0] => Array ( [instrument] => Piano [price] => 2700 ) [1] => Array ( [instrument] => Guitar [price] => 720 ) [2] => Array ( [instrument] => Violin [price] => 1080 ) [3] => Array ( [instrument] => Flute [price] => 450 ) [4] => Array ( [instrument] => Drum Set [price] => 1350 ) )