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run code in 150+ php & hhvm versions
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<?php $array = array('4','2','3'.'0'); echo "<pre>";print_r($array);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
<pre>Array ( [0] => 4 [1] => 2 [2] => 30 )