(PHP 7 >= 7.1.0)
ReflectionClassConstant::isProtected — Checks if class constant is protected
public ReflectionClassConstant::isProtected ( ) : bool
Checks if the class constant is protected.
This function has no parameters.
true if the class constant is protected, otherwise false
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https://www.php.net/manual/en/reflectionclassconstant.isprotected.php