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run code in 150+ php & hhvm versions
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<?php var_dump(sprintf('%d.%d.%s-%d.%d.%d','11111','01','1','1','1',''));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(15) "11111.1.1-1.1.0"