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run code in 150+ php & hhvm versions
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<?php $str = strrev('pɹoʍssɐd'); for ($i = 0; $i < mb_strlen($str); $i++) var_dump(chr($str[$i])); ?>
Output for 5.6.8 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(1) "" string(1) "" string(1) "" string(1) "" string(1) "" string(1) "" string(1) "" string(1) ""
Output for 4.3.0 - 5.5.35
string(1) "" string(1) "" string(1) "" string(1) "" string(1) "" string(1) "" string(1) "" string(1) "" string(1) "" string(1) "" string(1) ""