Bug->Doc #80452 [Nab->ReO]: Null Coalesce Operator Swallow warning error

Edit report at https://bugs.php.net/bug.php?id=80452&edit=1 ID: 80452 Updated by: cmb@php.net Reported by: cxlblm at gmail dot com Summary: Null Coalesce Operator Swallow warning error -Status: Not a bug +Status: Re-Opened -Type: Bug +Type: Documentation Problem Package: *General Issues Operating System: docker/ubuntu PHP Version: 8.0.0 Assigned To: cmb Block user comment: N Private report: N New Comment: Ah, I see. The docs need to updated in this regard. Previous Comments: ------------------------------------------------------------------------ [2020-12-01 11:59:42] rtrtrtrtrt at dfdfdfdf dot dfd > Accessing a scalar as an array before php8 will trigger > a notice, but in php8 it will trigger a warning! how does that change the simple fact that the purpose of "Null Coalesce" is either take the left part if it's defined or take the right part? NOTICE versus WARNING is only relevant for error_reporting ------------------------------------------------------------------------ [2020-12-01 11:55:00] cxlblm at gmail dot com Sorry, my English not good! see https://3v4l.org/bX1Q1 According to the description of rfc(https://wiki.php.net/rfc/isset_ternary), Null Coalesce Operator will only suppress notice message. Accessing a scalar as an array before php8 will trigger a notice, but in php8 it will trigger a warning! ------------------------------------------------------------------------ [2020-12-01 11:40:08] cmb@php.net Yes, that is the whole purpose of the null coalesce operator: <https://www.php.net/manual/en/language.operators.comparison.php#language.operators.comparison.coalesce>. ------------------------------------------------------------------------ [2020-12-01 11:30:51] cxlblm at gmail dot com Thank you for your prompt response! https://3v4l.org/lsuFc If there is no ?? in the sixth line of the code, a warning will be raised, but Null Coalesce Operator is completely safe and will not raise an E_NOTICE! ------------------------------------------------------------------------ [2020-12-01 11:21:01] cmb@php.net From looking at <https://3v4l.org/4JIAY>, this doesn't appear to be a bug. The warning is raised in line 5, where the null coalesce operator is not used. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=80452 -- Edit this bug report at https://bugs.php.net/bug.php?id=80452&edit=1