Bug #79715 [Opn->Nab]: After the array element reference changes, use array_merge function produc

Edit report at https://bugs.php.net/bug.php?id=79715&edit=1 ID: 79715 Updated by: nikic@php.net Reported by: xyzzxf_2013 at 163 dot com Summary: After the array element reference changes, use array_merge function produc -Status: Open +Status: Not a bug Type: Bug Package: Unknown/Other Function Operating System: centos 7/window 10 PHP Version: 7.3.4nts Block user comment: N Private report: N New Comment: See https://www.php.net/manual/en/language.references.whatdo.php for how arrays and references interact. In particular, even if you pass an array by-value, it still retains any internal references. If your case, there is an active reference to the last array element. You can drop it by calling unset($v) after the foreach loop. tl;dr Don't use references, just don't. Previous Comments: ------------------------------------------------------------------------ [2020-06-19 07:57:15] xyzzxf_2013 at 163 dot com php version ------------------------------------------------------------------------ [2020-06-19 07:52:16] xyzzxf_2013 at 163 dot com Description: ------------ Reference value modification of element of array Test script: --------------- $a = ['23','25','26']; foreach ($a as &$v) { $v = $v+1; } function get_check_code($data) { foreach ($data as &$a) { $a = hexdec($a); } $sum = dechex(array_sum($data)); return substr($sum, -2); } var_dump($a); $b = get_check_code($a); $c = array_merge($a,[$b]); print_r($c); Expected result: ---------------- var_dump($a) output array(3) { [0] => int(24) [1] => int(26) [2] => int(27) } print_r($c) output Array ( [0] => 24 [1] => 26 [2] => 39 [3] => 71 ) Actual result: -------------- The expected result of print_r($c) is Array ( [0] => 24 [1] => 26 [2] => 27 [3] => 71 ) or Array ( [0] => 36 [1] => 38 [2] => 39 [3] => 71 ) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79715&edit=1