ReflectionClass::hasConstant Checks if constant is defined &reftitle.description; public boolReflectionClass::hasConstant stringname Checks whether the class has a specific constant defined or not. &reftitle.parameters; name The name of the constant being checked for. &reftitle.returnvalues; &true; if the constant is defined, otherwise &false;. &reftitle.examples; <methodname>ReflectionClass::hasConstant</methodname> example hasConstant("c1")); var_dump($class->hasConstant("c2")); ?> ]]> &example.outputs.similar; &reftitle.seealso; ReflectionClass::hasMethod ReflectionClass::hasProperty