Use of nullable mixed is forbidden PHP-T1006
Type check
Critical
Autofix The mixed type already includes null, so specifying mixed type as a nullable is redundant and doesn't make any sense. PHP lets you typehint properties, parameters, and return values as mixed which can contain any value.
To fix this issue, it is recommended to drop null from the nullable mixed type.
Bad practice
class ErrorHandler
{
// invalid: mixed already includes null
private ?mixed $lastFatalTrace = null;
}
Recommended
class ErrorHandler
{
private mixed $lastFatalTrace = null;
}