Error Codes

The following table lists most of the available code diagnostics.

Diagnostics

Message

id title description
PHP6601 Name can be simplified The name can be written in a shorter or simpler form.

Warning

id title description
PHP0171 MagicMethodMustBePublicNonStatic
PHP0172 CallStatMustBePublicStatic
PHP0401 Array index type mismatch Index of array must be of type string or integer.
PHP0402 Function name type mismatch Expression must be callable when used as an indirect function call. E.g.

$name = "foo";
$name(); // $name should be callable or string
PHP0404 Method on non-object Instance functions can be called only using an object instance. E.g

$obj->foo(); // $obj must not be a scalar type or null, it must be an object
PHP0405 Not all code paths return When function is expected to return a value, all code paths have to return and all returns have to return a value.
PHP0406 Argument type mismatch Values supplied to a function call must match its arguments type.
PHP0407 Property on non-object Properties can be accessed only using an object instance. E.g

echo $obj->prop; // $obj must be an object
PHP0408 Return type mismatch Values returned from a function must match expected type which is defined in PHPDoc @return tag or other returned values.
PHP0409 Scalar used as array Expressions accessed with [] operator have to be of type array, string or object.
PHP0410 Type mismatch Value has to be assignable to the expected type.
PHP0411 Unused label Defined labels should be used.
PHP0413 Unknown class name Class or interface is unknown.
PHP0414 Unknown class constant Class constant is unknown.
PHP0415 Unknown constant Global constant is unknown.
PHP0416 Unknown field use Property is unknown.
PHP0417 Unknown function call Global function is unknown.
PHP0418 Unknown method call Class function is unknown.
PHP0419 Unreachable code Code won't be called in runtime.
PHP0420 Infinite loop Code contains an infinite loop and the function never exits.
PHP0421 Unused variable Assigned variables should be used.
PHP0422 Assignment made to same variable Assigning a variable to itself has no effect. This may indicate a potentional typo or copy-paste bug.
PHP0423 Missing mandatory argument All mandatory arguments to function call have to be supplied.
PHP0424 Object used as array Object accessed with [] operator has to implement ArrayAccess interface.
PHP0431 Division by zero
PHP0432 Implemented type is not an interface
PHP0433 Duplicit case The case is duplicated within the switch block.
PHP0434 Parent class is final Parent class is declared as final.
PHP0435 Method must return string The method only allows to return string value.
PHP0436 MethodMustNotReturnValue
PHP0437 ThisInGlobalCode
PHP0438 NonTraversableUnpacked
PHP0439 PCREPatternError There is an error in the Perl Compatible Regular Expression (PCRE) pattern.
PHP0440 Duplicit array key The key is already used in the array initializer.
PHP0441 Arguments when there is no constructor NewArgsWithNoConstructor
PHP0442 EmptyNamespaceDecl
PHP1401 Argument cannot be passed as alias Only variables can be passed as aliased function argument.

Error

id title description
PHP1008 InterfaceMethodWithBody
PHP1009 AbstractMethodWithBody
PHP1010 NonAbstractMethodWithoutBody
PHP1014 DestructCannotBeStatic
PHP1015 AbstractPrivateMethodDeclared
PHP1024 ConstructCannotBeStatic
PHP1037 AbstractFinalMethodDeclared
PHP1045 MethodCannotTakeArguments
PHP1402 NonExceptionThrown
PHP1403 NonExceptionCatch
PHP1404 NeverReturningReturnsImplicitly
PHP1405 WritingToGlobals
PHP1406 ReferencingGlobals
PHP1407 AbstractMethodInNonabstractClassError abstract methods can be defined in abstract classes only.
PHP1408 VoidAssigned
PHP1409 VoidReturned
PHP1412 Uninitialized variable Variables has to be assigned before they are used.
PHP2407 MustNotDeclareReturnType
PHP2408 MustTakeExactlyArgs
PHP2409 UnsupportedPropertyType
PHP2411 NotTrait A class or interface can't be used within the use clausule, only trait is allowed.

FatalError

id title description
PHP2000 TypeRedeclared
PHP2001 FunctionRedeclared
PHP2002 ConstantRedeclared
PHP2014 Syntax error Source code contains an unexpected token and can't be parsed.
PHP2401 New of abstract class Instantiation of abstract class is not allowed.
PHP2402 New of interface Instantiation of interface is not allowed.
PHP2403 Redefined label Labels can be defined only once.
PHP2404 Assignment to $this Assignment to $this variable is not allowed.
PHP2405 Undefined label Used labels have to be defined.
PHP2406 ThisOutsideObject
PHP2410 TraitCreated
PHP2412 ParentTrait
PHP2413 ParentInterface
PHP2414 UnimplementedAbstracts
PHP2415 CtorPropertyInAbstractMember
PHP2416 CtorPropertyNotConstructor
PHP2417 CtorPropertyVariadic
PHP2418 TypeCannotBeNullable
PHP2419 ParameterTypeCannotBeVoid
PHP2420 UnsupportedUnionType
PHP2421 InvalidIterableDefault
PHP2422 UnknownNamedParam
PHP2423 PositionalParamAfterNamed
PHP2424 NamedParamOverwrites
PHP2425 Parameter Type Cannot Be Never Parameters cannot have type "never", because it does not make any sense. "never" is only applicable as a function return type.
PHP2426 NeverReturningReturns
PHP2427 EnumCreated
PHP2428 NeedsArrayIndexForReading
PHP2429 ParameterTypeCannotBeStatic
PHP2430 CannotBeUsedAsIntersectionType
PHP2431 ReadOnlyPropertyMustHaveType
PHP2432 NamespaceMustBeTheOnlyStatement
PHP2433 Field already declared Field with the same name cannot be declared more than once in the same class
PHP2434 BreakWrongContext

Compatibility Group

Message

id title description
PHP6403 Deprecated construct Deprecated type, function or constant
PHP6404 Not defined in target runtime There is no definition in current version of your runtime. Update to a version that supports it.
PHP6405 Removed The definition has been removed. Do not use it anymore.
PHP6406 UserDeprecated
PHP6407 PHP4-style constructor is deprecated PHP 4 style constructors (methods that have the same name as the class they are defined in) are deprecated, and will be removed in the future. PHP 7 will emit E_DEPRECATED if a PHP 4 constructor is the only constructor defined within a class. Classes that implement a __construct() method are unaffected.
PHP6408 ResourceConstant

Warning

id title description
PHP6402 Future primitive type
PHP6409 ArrayConstant

Error

id title description
PHP6401 Unsupported construct

PhpDoc Group

Message

id title description
PHP6501 PHPDocTagUseInstead
PHP6502 PHPDocTagUseInstead
PHP6503 PHPDocTagUseInstead
PHP6504 PHPDocTypeSuggestion
PHP6506 PHPDocNotFullyQualifiedTypeName

Warning

id title description
PHP6505 PHPDocInvalidTypeUsed

Outlining Group

Message

id title description
PHP6550 #region missing There is #endregion tag without a starting #region tag.
PHP6551 #endregion missing A #region tag denotating a collapsible block is not closed with a corresponding #endregion.