Bug #76470 [Nab]: count(false)===1

Edit report at https://bugs.php.net/bug.php?id=76470&edit=1 ID: 76470 Updated by: nikic@php.net Reported by: mordyg at gmail dot com Summary: count(false)===1 Status: Not a bug Type: Bug Package: Variables related Operating System: N/A PHP Version: 7.1.18 Block user comment: N Private report: N New Comment: See also https://3v4l.org/WUgRo for why it works like it does. But as @danack mentioned, this kind of stuff is exactly why count() generates a warning starting with PHP 7.2. Previous Comments: ------------------------------------------------------------------------ [2018-06-13 14:04:13] danack@php.net This is likely to not be fixed as although it's clearly not great behaviour, it is how it has been for ages, so fixing it would 'break' lots of 'working' code. However from PHP 7.2, trying to count a non-countable thing gives a warning notice: https://wiki.php.net/rfc/counting_non_countables If you have an error handler, that converts all warnings to exceptions, the behaviour is then acceptable. ------------------------------------------------------------------------ [2018-06-13 14:01:59] requinix@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php http://php.net/manual/en/function.count.php > Returns the number of elements in array_or_countable. When the parameter is neither an array > nor an object with > implemented Countable interface, 1 will be returned. There is one exception, if > array_or_countable is NULL, 0 > will be returned. ------------------------------------------------------------------------ [2018-06-13 13:59:18] mordyg at gmail dot com Just to clarify .. count(null) ===0 So if you say this is not a bug as it a non-countable, then you have a new bug, that count(null) should be 1, not 0 ------------------------------------------------------------------------ [2018-06-13 13:53:50] mordyg at gmail dot com Description: ------------ https://github.com/php/php-src/blob/master/ext/standard/array.c#L829 [] is falsey, so count(false) should equal count([]) Code shows otherwise. Test script: --------------- echo []?'Y':'N'; // outputs N echo false?'Y':'N'; //outputs N echo count([])?'Y':'N'; //outputs N echo count(false)?'Y':'N'; //outputs Y ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=76470&edit=1