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run code in 300+ PHP versions simultaneously
<?php date_default_timezone_set('Europe/Berlin'); # timezone with DST echo mktime(0, 0, 0, 10, 28, 2014), "\n"; #1414450800 for PHP versions 5.1.0 - 5.5.8 echo mktime(0, 0, 0, 10, 14, 2014), "\n";
Output for git.master, git.master_jit, rfc.property-hooks
1414450800 1413237600

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