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run code in 200+ php & hhvm versions
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<?php echo preg_replace('/(\d\d\.\d\d.\d\d\d\d) (\d\d:\d\d)/','$1 в $2','01.01.2014 08:22:50');
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.2.0
01.01.2014 в 08:22:50