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<?php $c = ['one'=>['two' =>['t' => false]]]; $p = explode('.', 'one.two.tree'); $v = true; $cf = &$c; foreach($p as $t) { $cf = &$cf[$t]; } $cf = $v; var_dump($cf, $c);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 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
bool(true) array(1) { ["one"]=> array(1) { ["two"]=> array(2) { ["t"]=> bool(false) ["tree"]=> &bool(true) } } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/VGjb1 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/VGjb1 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/VGjb1 on line 3
Process exited with code 255.

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