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run code in 200+ php & hhvm versions
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<?php $arr = ['one', 'terefere']; var_dump(serialize($arr));
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
string(39) "a:2:{i:0;s:3:"one";i:1;s:8:"terefere";}"