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run code in 150+ php & hhvm versions
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<?php var_dump(max(explode('.','В. Д. Путин'))); var_dump(explode('.','В. Д. Путин'));
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
string(2) "В" array(3) { [0]=> string(2) "В" [1]=> string(3) " Д" [2]=> string(11) " Путин" }
Output for hhvm-3.10.0

Process exited with code 153.