Issue Kinds

All 144 issue types mir can emit, grouped by category. Each issue has a stable MIR#### code that appears in CLI output and JSON/SARIF — see Error codes for the full numeric index.

Select a category to drill into individual issues.

Undefined UndefinedVariable · PossiblyUndefinedVariable · UndefinedFunction · UndefinedMethod · UndefinedClass · UndefinedProperty · UndefinedConstant · ParentNotFound · InaccessibleClassConstant

Nullability NullArgument · NullPropertyFetch · NullMethodCall · NullArrayAccess · PossiblyNull* · PossiblyInvalidArgument · NullableReturnStatement

Type Mismatches InvalidReturnType · InvalidArgument · TooFewArguments · TooManyArguments · InvalidNamedArgument · InvalidPassByReference · InvalidPropertyAssignment · InvalidCast · InvalidOperand · MismatchingDocblock(Return|Param)Type · InvalidStringClass · PossiblyInvalidOperand · PossiblyNullOperand · InvalidStaticInvocation · NonStaticSelfCall · DirectConstructorCall · InvalidPropertyFetch · InvalidArrayAccess · InvalidArrayAssignment

Array InvalidArrayOffset · NonExistentArrayOffset · PossiblyInvalidArrayOffset

Redundancy RedundantCondition · RedundantCast · UnnecessaryVarAnnotation · TypeDoesNotContainType · ParadoxicalCondition

Dead Code UnusedVariable · UnusedParam · UnusedMethod · UnusedProperty · UnusedFunction · UnreachableCode · UnusedForeachValue

Inheritance UnimplementedAbstractMethod · UnimplementedInterfaceMethod · MethodSignatureMismatch · OverriddenMethodAccess · InvalidExtendClass · FinalMethodOverridden · AbstractInstantiation · CircularInheritance · InvalidOverride · InterfaceInstantiation · OverriddenPropertyAccess

Security TaintedInput · TaintedHtml · TaintedSql · TaintedShell

Generics InvalidTemplateParam · ShadowedTemplateParam

Other Deprecated* · InternalMethod · WrongCase* · Missing(Return|Param)Type · Mixed* · InvalidClone · PossiblyInvalidClone · InvalidToString · InvalidThrow · InvalidCatch · MissingThrowsDocblock · ReadonlyPropertyAssignment · ParseError · InvalidDocblock · InvalidTraitUse · Implicit*Cast

Attributes InvalidAttribute · UndefinedAttributeClass · DuplicateClass