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run code in 200+ php & hhvm versions
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<?php define("TRUE", false); if (1==1) { echo "TRUE"; } else { echo "FALSE"; }
Output for 5.3.0 - 5.6.30, 7.0.0 - 7.2.0
TRUE
Output for hhvm-3.10.1 - 3.17.3
Notice: Constant TRUE already defined in /in/X5pqm on line 3 TRUE