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<?php if(defined("WHATEVER_THIS_ISNT_DEFINED")){ // double quotes needed! echo 'yup, constant defined'; } else { echo 'nope, does not exist'; } if(defined('WHATEVER_THIS_ISNT_DEFINED')){ // single quotes won't suppress error notice echo 'yup, constant defined'; } else { echo 'nope, does not exist'; }
Output for git.master, git.master_jit, rfc.property-hooks
nope, does not existnope, does not exist

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