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run code in 200+ php & hhvm versions
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<?php $aaa = 123; $bbb = 'abc'; $enc = var_export(compact("aaa","bbb"),true); var_dump($enc);
based on tEoJC
Output for 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.0 - 7.3.0beta1
string(43) "array ( 'aaa' => 123, 'bbb' => 'abc', )"