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run code in 150+ php & hhvm versions
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<?php $con="one"; if(!con) { echo "could not connect" ; } else { echo "connected"; }
Output for 5.5.0 - 7.1.0
Notice: Use of undefined constant con - assumed 'con' in /in/PXBtk on line 3 connected
Output for 4.3.0 - 5.4.45
connected