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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = new stdClass(); $a->foo = 'FOO'; $foo = 'foo'; echo $a->{$foo};
Output for 5.3.19 - 5.6.38, hhvm-3.10.1 - 3.22.0, 7.0.0 - 7.2.12
FOO