Bug #73844 [Asn->Csd]: Cannot use lexical variable $variable as a parameter name inside array_walk()

Edit report at https://bugs.php.net/bug.php?id=73844&edit=1 ID: 73844 Updated by: aharvey@php.net Reported by: pagescene at gmail dot com Summary: Cannot use lexical variable $variable as a parameter name inside array_walk() -Status: Assigned +Status: Closed Type: Bug Package: Scripting Engine problem Operating System: Linux PHP Version: 7.1.0 Assigned To: aharvey Block user comment: N Private report: N New Comment: Commits made; closing. php-src: https://github.com/php/php-src/commit/eb25e1496277079423bdf2dee5aa4133c49e1f53 Docs: http://svn.php.net/viewvc?view=revision&revision=341552 Previous Comments: ------------------------------------------------------------------------ [2016-12-30 19:57:36] aharvey@php.net Automatic comment from SVN on behalf of aharvey Revision: http://svn.php.net/viewvc/?view=revision&revision=341552 Log: Document new use() behaviour in PHP 7.1. Fixes bug #73844 (Cannot use lexical variable $variable as a parameter name inside array_walk()). ------------------------------------------------------------------------ [2016-12-30 19:36:43] aharvey@php.net This is expected behaviour: it was introduced in https://github.com/php/php-src/commit/35662c9bd3d88924ccf4683ff5fa2c710bb2b04b, but UPGRADING wasn't updated, so it didn't make it into the migration guide. I'll update UPGRADING and the migration guide to note the change in PHP 7.1. ------------------------------------------------------------------------ [2016-12-30 17:12:16] pagescene at gmail dot com Description: ------------ The following code works fine under earlier PHP versions including PHP 7.0.x, however it results in fatal error "Cannot use lexical variable $variable as a parameter name inside array_walk()" under PHP 7.1 Test script: --------------- $value = 'b'; $checkbox_values = ['a' => 'Aaa', 'b' => 'Bbb', 'c' => 'Ccc']; array_walk($checkbox_values, function(&$value, $key) use($value) { $value = (int)(strval($key) === $value); }); print_r($checkbox_values); Expected result: ---------------- Array ( [a] => 0 [b] => 1 [c] => 0 ) Actual result: -------------- Fatal error: Cannot use lexical variable $value as a parameter name in / on line 4 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=73844&edit=1