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run code in 150+ php & hhvm versions
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<?php putenv("LOGIN=TEST"); $login = getenv("LOGIN"); echo "LOGIN = " .$login." "; putenv("LOGIN1=$login"); $login1 = getenv("LOGIN1"); echo "LOGIN1 = " .$login1;
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
LOGIN = TEST LOGIN1 = TEST
Output for hhvm-3.10.0

Process exited with code 153.