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run code in 200+ php & hhvm versions
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<?php $id = filter_var('foo', FILTER_VALIDATE_INT, [ 'options' => ['default' => 2], ]); var_dump($id);
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
int(2)