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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = new StdClass; $b = &$a; $c = &$b; unset($b); var_dump($a, $b, $c); ?>
based on pcacZ
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: b in /in/6mclp on line 6 object(stdClass)#1 (0) { } NULL object(stdClass)#1 (0) { }
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: b in /in/6mclp on line 6 object(stdClass)#1 (0) { } NULL object(stdClass)#1 (0) { }
Output for 4.3.0 - 4.4.9
Notice: Undefined variable: b in /in/6mclp on line 6 object(stdClass)(0) { } NULL object(stdClass)(0) { }