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@ 2016-06-10T08:40:16Z

<?php

$foo = function () use (&$ref) {
    return $ref = ["foo" => &$foo];
};
$a = $foo();
$ref["foo"] = 2;
var_dump($a);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

45.94 ms | 1807 KiB | 5 Q