static function returnConstantByValue() { return 100; } static function &returnConstantByRef() { return 100; } static function &returnVariableByRef() { return $GLOBALS['a']; } } echo "\n---> 1. Trying to assign by reference the return value of a function that returns by value:\n"; unset($a, $b); $a = 4; $b =& C::returnConstantByValue(); $a++; var_dump($a, $b); echo "\n---> 2. Trying to assign by reference the return value of a function that returns a constant by ref:\n"; unset($a, $b); $a = 4; $b =& C::returnConstantByRef(); $a++; var_dump($a, $b); echo "\n---> 3. Trying to assign by reference the return value of a function that returns by ref:\n"; unset($a, $b); $a = 4; $b =& C::returnVariableByRef(); $a++; var_dump($a, $b);
{ return 100; } function &returnConstantByRef() { return 100; } static function &returnVariableByRef() { return $GLOBALS['a']; } } $c = new C(); echo "\n---> 1. Trying to assign by reference the return value of a function that returns by value:\n"; unset($a, $b); $a = 4; $b =& $c->returnConstantByValue(); $a++; var_dump($a, $b); echo "\n---> 2. Trying to assign by reference the return value of a function that returns a constant by ref:\n"; unset($a, $b); $a = 4; $b =& $c->returnConstantByRef(); $a++; var_dump($a, $b); echo "\n---> 3. Trying to assign by reference the return value of a function that returns by ref:\n"; unset($a, $b); $a = 4; $b =& $c->returnVariableByRef(); $a++; var_dump($a, $b);