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@ 2014-09-22T12:21:04Z

<?php

var_dump(defined('HHVM_VERSION'));
var_dump(defined('HHVM_VERSION_ID'));

// test HHVM_VERSION and HHVM_VERSION_ID matches
$version = explode('.', PHP_VERSION);

var_dump(PHP_VERSION_ID == ($version[0] * 10000 + $version[1] * 100 + $version[2]));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
explode: documentation ( source)

preferences:dark modelive preview

41.39 ms | 402 KiB | 5 Q