(PHP 8 >= 8.5.0)
ReflectionConstant::getFileName — Gets name of the defining file
public ReflectionConstant::getFileName(): string|false
Gets the filename of the file in which the constant has been defined.
This function has no parameters.
Returns the filename of the file in which the constant has been defined. If the constant is defined in the PHP core or in a PHP extension, false is returned.
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https://www.php.net/manual/en/reflectionconstant.getfilename.php