Bug #79592 [Opn->Nab]: Converting string to bool when "0" passed

Edit report at https://bugs.php.net/bug.php?id=79592&edit=1 ID: 79592 Updated by: girgias@php.net Reported by: 6562680 at gmail dot com Summary: Converting string to bool when "0" passed -Status: Open +Status: Not a bug Type: Bug Package: Filter related Operating System: Win10 PHP Version: 7.3.17 Block user comment: N Private report: N New Comment: This is documented behaviour, if you want a reason why this behaves like this imagine it being converted to an integer first and then converted to a boolean (because in effect a boolean is just an integer that is 0 for false and anything else for true). Previous Comments: ------------------------------------------------------------------------ [2020-05-12 21:14:32] 6562680 at gmail dot com Description: ------------ I know, i know... "you should use strict_types()" and so... But really guys, why, exactly, why string "0" will be converted to false while calling (bool) ? Please :/// Once i found same joke while comparing two values on usort(), fixed... now i remember used everywhere (! $string) and confused... little bit. Test script: --------------- function (string $name) { if (! $name) { // nice one, junior, you'll lose "0" right here // please rewrite your project and use ('' !== $name) or be fired throw new \InvalidArgumentException('String should be not empty'); } // some code } Expected result: ---------------- (bool) 0 === false (bool) "0" === true (bool) (string) 0 === true ... Actual result: -------------- (bool) 0 === false (bool) "0" === false (bool) (string) 0 === false ... ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79592&edit=1