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<?php
 
$a = array('a' => 1);
$a['a'] = &$a['b'];
var_dump($a);

Success #stdin #stdout 0.01s 20568KB

stdin

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Standard input is empty

stdout

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array(2) {
  ["a"]=>
  &NULL
  ["b"]=>
  &NULL
}

https://ideone.com/NCb9AW

language:

PHP (php 7.3.5)

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public

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