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run code in 200+ php & hhvm versions
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<?='<?xml version="1.0" encoding="UTF-8"?>'?>
Output for 5.4.0 - 7.1.7
<?xml version="1.0" encoding="UTF-8"?>
Output for 5.3.0 - 5.3.29
<?='<?xml version="1.0" encoding="UTF-8"?>'?>