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run code in 200+ php & hhvm versions
Bugs & Features
<?php if(defined(WHATEVER_THIS_ISNT_DEFINED)){ echo 'yup, constant defined'; } else { echo 'nope, does not exist'; }
Output for 7.2.0 - 7.2.6
Warning: Use of undefined constant WHATEVER_THIS_ISNT_DEFINED - assumed 'WHATEVER_THIS_ISNT_DEFINED' (this will throw an Error in a future version of PHP) in /in/Y1S8Z on line 2 nope, does not exist
Output for 4.3.0 - 7.1.20
Notice: Use of undefined constant WHATEVER_THIS_ISNT_DEFINED - assumed 'WHATEVER_THIS_ISNT_DEFINED' in /in/Y1S8Z on line 2 nope, does not exist