Online PHP editor | output for nrpE5

@ 2017-01-31T08:52:52Z

<?php
$mock = [
    'foo' => null
];
foreach ($mock as &$item) {
    $item = 'foo';
}

$mockCopy = $mock;
var_dump("after assignment", $mock, $mockCopy);
$mockCopy['foo_copy'] = $mock['foo'];
var_dump("after foo_copy", $mock, $mockCopy);
$mockCopy['foo'] = 'bar';
var_dump("after foo=bar", $mock, $mockCopy);

var_dump($mock['foo']);

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: string(16) "after assignment" array(1) { ["foo"]=> &string(3) "foo" } array(1) { ["foo"]=> &string(3) "foo" } string(14) "after foo_copy" array(1) { ["foo"]=> &string(3) "foo" } array(2) { ["foo"]=> &string(3) "foo" ["foo_copy"]=> string(3) "foo" } string(13) "after foo=bar" array(1) { ["foo"]=> &string(3) "bar" } array(2) { ["foo"]=> &string(3) "bar" ["foo_copy"]=> string(3) "foo" } string(3) "bar"

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