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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']; json_encode($x);
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