On Wed, 19 Feb 2020 at 15:05, Côme Chilliet < come.chill...@fusiondirectory.org> wrote:
> > Is ++$a behaving differently than $a++ for NULL/FALSE/TRUE? > The actual implementation of incrementing and decrementing is the same whichever operator you use, it's just wrapped in code to return the old/new value as appropriate. So right now, for false and true (and for null with --), you can't tell the difference, because the variable is the same before and after. For null (with ++), they evaluate to the old or new value, as expected: $a = null; var_dump( $a++, $a ); // NULL, int(1) $a = null; var_dump( ++$a, $a ); // int(1), int(1) As far as I can see, null and bool are simply missing from the switch statement that special cases each type of variable: - increment_function (has null but no bool): https://github.com/php/php-src/blob/26327bcd3b6375a4883f00a289ba129e5b23717d/Zend/zend_operators.c#L2299 - decrement_function (has neither): https://github.com/php/php-src/blob/26327bcd3b6375a4883f00a289ba129e5b23717d/Zend/zend_operators.c#L2359 Regards, -- Rowan Tommins [IMSoP]
