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run code in 150+ php & hhvm versions
Bugs & Features
<?php $s = null . ''; var_dump($s); $s = null . null; var_dump($s); $s = null . ''; var_dump($s); $s = null . 'w'; var_dump($s);
Output for 4.3.0 - 7.1.0
string(0) "" string(0) "" string(0) "" string(1) "w"