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@ 2016-09-30T09:32:14Z

<?php

$array = []; 
$array['a'] =& $array['b']; 
$array['b'] = 1;

var_dump($array);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

116.3 ms | 1561 KiB | 5 Q