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<?php $mock = [ 'foo' => null ]; foreach ($mock as &$item) { $item = 'foo'; } unset($item); $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 git.master, git.master_jit, rfc.property-hooks
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) "foo" } array(2) { ["foo"]=> string(3) "bar" ["foo_copy"]=> string(3) "foo" } string(3) "foo"

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