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<?php // Assignment of an object Class Object{ public $foo="bar"; }; $objectVar = new Object(); $reference =& $objectVar; $assignment = $objectVar; $objectVar->foo = "qux"; var_dumpprint_r( $objectVar ); var_dumpprint_r( $reference ); var_dumpprint_r( $assignment ); $objectVar = null; var_dump($objectVar); var_dump($reference); var_dump($assignment);