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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 'foo'; var_dump($a); $a = (unset) $a; var_dump($a);
Output for 7.2.0
Deprecated: The (unset) cast is deprecated in /in/lgoj1 on line 7 string(3) "foo" NULL
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.1.10
string(3) "foo" NULL