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<?php $x['a']['b']['c']['d']['e']='y'; $x['aaa']='FirstLevel'; $x['a']['_parent'] = &$x; $x['a']['b']['_parent'] = &$x['a']; $x['a']['b']['c']['_parent'] = &$x['a']['b']; $x['a']['b']['c']['d']['_parent'] = &$x['a']['b']['c']; print_r($x);
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [a] => Array ( [b] => Array ( [c] => Array ( [d] => Array ( [e] => y [_parent] => Array *RECURSION* ) [_parent] => Array *RECURSION* ) [_parent] => Array *RECURSION* ) [_parent] => Array *RECURSION* ) [aaa] => FirstLevel )
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Array ( [a] => Array ( [b] => Array ( [c] => Array ( [d] => Array ( [e] => y [_parent] => Array *RECURSION* ) [_parent] => Array *RECURSION* ) [_parent] => Array *RECURSION* ) [_parent] => Array ( [a] => Array *RECURSION* [aaa] => FirstLevel ) ) [aaa] => FirstLevel )
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Array ( [a] => Array ( [b] => Array ( [c] => Array ( [d] => Array ( [e] => y [_parent] => Array *RECURSION* ) [_parent] => Array ( [c] => Array ( [d] => Array ( [e] => y ) [_parent] => Array *RECURSION* ) [_parent] => Array ( [b] => Array *RECURSION* [_parent] => Array ( [a] => Array *RECURSION* [aaa] => FirstLevel ) ) ) ) [_parent] => Array ( [b] => Array ( [c] => Array ( [d] => Array ( [e] => y ) [_parent] => Array *RECURSION* ) [_parent] => Array *RECURSION* ) [_parent] => Array ( [a] => Array *RECURSION* [aaa] => FirstLevel ) ) ) [_parent] => Array ( [a] => Array *RECURSION* [aaa] => FirstLevel ) ) [aaa] => FirstLevel )
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5
Array ( [a] => Array ( [b] => Array ( [c] => Array ( [d] => Array ( [e] => y [_parent] => Array *RECURSION* ) [_parent] => Array *RECURSION* ) [_parent] => Array ( [b] => Array ( [c] => Array ( [d] => Array ( [e] => y ) ) [_parent] => Array *RECURSION* ) [_parent] => Array ( [a] => Array *RECURSION* [aaa] => FirstLevel ) ) ) [_parent] => Array ( [a] => Array ( [b] => Array ( [c] => Array ( [d] => Array ( [e] => y ) ) [_parent] => Array *RECURSION* ) [_parent] => Array *RECURSION* ) [aaa] => FirstLevel ) ) [aaa] => FirstLevel )

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