# PHPStan identifiers PHPStan names each error with an identifier, such as `argument.type`. This page lists the identifiers of PHPStan and phpstan-deprecation-rules that have Mago issues for the same finding. Search it for an identifier from a baseline, an `ignoreErrors` entry or a `@phpstan-ignore` comment. The [`phpstan-ignores` plugin]() reads the same table. With the plugin on, a comment that ignores one of these identifiers drops the matching Mago issues on the line that it [covers](). An identifier that isn't listed can still have a Mago issue for the same finding. The table holds the ones matched by the plugin. The identifiers of phpstan-drupal are on the [phpstan-drupal]() page. | PHPStan identifier | Mago issues | | --- | --- | | `argument.type` | `false-argument`, `invalid-argument`, `less-specific-argument`, `less-specific-nested-argument-type`, `mixed-argument`, `null-argument`, `possibly-false-argument`, `possibly-invalid-argument`, `possibly-null-argument`, `template-constraint-violation` | | `arguments.count` | `too-few-arguments`, `too-many-arguments` | | `array.invalidKey` | `invalid-array-element-key`, `mixed-array-index` | | `assign.propertyType` | `invalid-property-assignment-value`, `mixed-property-type-coercion`, `property-type-coercion` | | `assignOp.invalid` | `invalid-operand`, `mixed-operand`, `possibly-false-operand`, `possibly-invalid-operand`, `possibly-null-operand` | | `binaryOp.invalid` | `invalid-operand`, `mixed-operand`, `possibly-false-operand`, `possibly-invalid-operand`, `possibly-null-operand` | | `booleanAnd.alwaysFalse` | `impossible-condition` | | `booleanAnd.alwaysTrue` | `redundant-condition` | | `booleanAnd.leftAlwaysFalse` | `impossible-condition`, `redundant-logical-operation` | | `booleanAnd.leftAlwaysTrue` | `redundant-condition`, `redundant-logical-operation` | | `booleanAnd.rightAlwaysFalse` | `impossible-condition`, `redundant-logical-operation` | | `booleanAnd.rightAlwaysTrue` | `redundant-condition`, `redundant-logical-operation` | | `booleanNot.alwaysFalse` | `impossible-condition` | | `booleanNot.alwaysTrue` | `redundant-condition` | | `booleanOr.alwaysFalse` | `impossible-condition` | | `booleanOr.alwaysTrue` | `redundant-condition` | | `booleanOr.leftAlwaysFalse` | `impossible-condition`, `redundant-logical-operation` | | `booleanOr.leftAlwaysTrue` | `redundant-condition`, `redundant-logical-operation` | | `booleanOr.rightAlwaysFalse` | `impossible-condition`, `redundant-logical-operation` | | `booleanOr.rightAlwaysTrue` | `redundant-condition`, `redundant-logical-operation` | | `callable.nonCallable` | `invalid-callable` | | `class.extendsDeprecatedClass` | `deprecated-class`, `deprecated-trait` | | `class.implementsDeprecatedInterface` | `deprecated-class`, `deprecated-trait` | | `class.notFound` | `non-existent-class`, `non-existent-class-like` | | `classConstant.deprecated` | `deprecated-class-constant` | | `classConstant.deprecatedClass` | `deprecated-class`, `deprecated-trait`, `deprecated-class-constant` | | `classConstant.deprecatedEnum` | `deprecated-class`, `deprecated-trait`, `deprecated-class-constant` | | `classConstant.deprecatedInterface` | `deprecated-class`, `deprecated-trait`, `deprecated-class-constant` | | `classConstant.notFound` | `non-existent-class-constant` | | `clone.nonObject` | `invalid-clone`, `mixed-clone`, `possibly-invalid-clone` | | `constant.deprecated` | `deprecated-constant` | | `constant.notFound` | `non-existent-constant` | | `deadCode.unreachable` | `unevaluated-code` | | `elseif.alwaysFalse` | `impossible-condition` | | `elseif.alwaysTrue` | `redundant-condition` | | `empty.property` | `impossible-condition`, `redundant-condition`, `redundant-logical-operation` | | `empty.variable` | `impossible-condition`, `redundant-condition`, `redundant-logical-operation` | | `foreach.nonIterable` | `invalid-iterator`, `possibly-null-iterator` | | `function.alreadyNarrowedType` | `impossible-condition`, `redundant-condition`, `redundant-logical-operation`, `redundant-type-comparison` | | `function.deprecated` | `deprecated-function` | | `function.impossibleType` | `impossible-condition`, `impossible-type-comparison` | | `function.notFound` | `non-existent-function` | | `generics.notSubtype` | `docblock-type-mismatch` | | `identical.alwaysFalse` | `impossible-condition`, `impossible-type-comparison`, `redundant-comparison`, `redundant-condition`, `redundant-logical-operation` | | `identical.alwaysTrue` | `impossible-condition`, `impossible-type-comparison`, `redundant-comparison`, `redundant-condition`, `redundant-logical-operation` | | `if.alwaysFalse` | `impossible-condition` | | `if.alwaysTrue` | `redundant-condition` | | `instanceof.alwaysFalse` | `impossible-condition`, `impossible-type-comparison`, `redundant-condition`, `redundant-logical-operation` | | `instanceof.alwaysTrue` | `impossible-condition`, `redundant-condition`, `redundant-logical-operation`, `redundant-type-comparison` | | `interface.extendsDeprecatedInterface` | `deprecated-class`, `deprecated-trait` | | `isset.offset` | `impossible-condition`, `redundant-condition`, `redundant-logical-operation` | | `isset.property` | `impossible-condition`, `redundant-condition`, `redundant-logical-operation` | | `isset.variable` | `impossible-condition`, `redundant-condition`, `redundant-logical-operation` | | `match.unhandled` | `match-not-exhaustive` | | `method.alreadyNarrowedType` | `impossible-condition`, `redundant-condition`, `redundant-logical-operation`, `redundant-type-comparison` | | `method.deprecated` | `deprecated-method` | | `method.deprecatedClass` | `deprecated-class`, `deprecated-trait`, `deprecated-method` | | `method.deprecatedEnum` | `deprecated-class`, `deprecated-trait`, `deprecated-method` | | `method.deprecatedInterface` | `deprecated-class`, `deprecated-trait`, `deprecated-method` | | `method.impossibleType` | `impossible-condition`, `impossible-type-comparison` | | `method.nonObject` | `ambiguous-object-method-access`, `invalid-method-access`, `method-access-on-null`, `mixed-method-access`, `possible-method-access-on-null` | | `method.notFound` | `ambiguous-object-method-access`, `non-documented-method`, `non-existent-method`, `possibly-non-existent-method` | | `method.staticCall` | `invalid-static-method-access` | | `missingType.generics` | `missing-template-parameter` | | `missingType.iterableValue` | `imprecise-type` | | `missingType.parameter` | `missing-parameter-type` | | `missingType.property` | `missing-property-type` | | `missingType.return` | `missing-return-type` | | `new.deprecated` | `deprecated-class`, `deprecated-trait` | | `new.deprecatedClass` | `deprecated-class`, `deprecated-trait` | | `notIdentical.alwaysFalse` | `impossible-condition`, `impossible-type-comparison`, `redundant-comparison`, `redundant-condition`, `redundant-logical-operation` | | `notIdentical.alwaysTrue` | `impossible-condition`, `impossible-type-comparison`, `redundant-comparison`, `redundant-condition`, `redundant-logical-operation` | | `nullCoalesce.expr` | `redundant-null-coalesce` | | `nullCoalesce.offset` | `redundant-null-coalesce` | | `nullCoalesce.property` | `redundant-null-coalesce` | | `nullCoalesce.variable` | `redundant-null-coalesce` | | `nullsafe.neverNull` | `redundant-nullsafe-operator` | | `offsetAccess.invalidOffset` | `invalid-array-index`, `mismatched-array-index`, `mixed-array-index` | | `offsetAccess.nonArray` | `invalid-destructuring-source` | | `offsetAccess.nonOffsetAccessible` | `false-array-access`, `invalid-array-access`, `mixed-array-access`, `mixed-array-assignment`, `null-array-access`, `possibly-false-array-access`, `possibly-invalid-array-access`, `possibly-null-array-access` | | `offsetAccess.notFound` | `possibly-null-array-access`, `possibly-undefined-array-index`, `possibly-undefined-int-array-index`, `possibly-undefined-string-array-index`, `undefined-int-array-index`, `undefined-string-array-index` | | `parameter.phpDocType` | `docblock-type-mismatch` | | `parameterByRef.type` | `reference-constraint-violation` | | `postDec.type` | `invalid-operand`, `mixed-operand`, `possibly-false-operand`, `possibly-invalid-operand`, `possibly-null-operand` | | `postInc.type` | `invalid-operand`, `mixed-operand`, `possibly-false-operand`, `possibly-invalid-operand`, `possibly-null-operand` | | `preDec.type` | `invalid-operand`, `mixed-operand`, `possibly-false-operand`, `possibly-invalid-operand`, `possibly-null-operand` | | `preInc.type` | `invalid-operand`, `mixed-operand`, `possibly-false-operand`, `possibly-invalid-operand`, `possibly-null-operand` | | `property.defaultValue` | `invalid-property-default-value` | | `property.deprecated` | `deprecated-property` | | `property.deprecatedClass` | `deprecated-class`, `deprecated-trait` | | `property.nonObject` | `ambiguous-object-property-access`, `invalid-property-access`, `mixed-property-access`, `null-property-access`, `possibly-null-property-access` | | `property.notFound` | `ambiguous-object-property-access`, `non-documented-property`, `non-existent-property`, `possibly-non-existent-property` | | `property.phpDocType` | `docblock-type-mismatch` | | `return.empty` | `invalid-return-statement` | | `return.missing` | `missing-return-statement` | | `return.phpDocType` | `docblock-type-mismatch` | | `return.type` | `falsable-return-statement`, `invalid-return-statement`, `less-specific-nested-return-statement`, `less-specific-return-statement`, `mixed-return-statement`, `nullable-return-statement` | | `staticMethod.alreadyNarrowedType` | `impossible-condition`, `redundant-condition`, `redundant-logical-operation`, `redundant-type-comparison` | | `staticMethod.deprecated` | `deprecated-method` | | `staticMethod.deprecatedClass` | `deprecated-class`, `deprecated-trait`, `deprecated-method` | | `staticMethod.deprecatedEnum` | `deprecated-class`, `deprecated-trait`, `deprecated-method` | | `staticMethod.deprecatedInterface` | `deprecated-class`, `deprecated-trait`, `deprecated-method` | | `staticMethod.impossibleType` | `impossible-condition`, `impossible-type-comparison` | | `staticMethod.notFound` | `non-existent-method` | | `staticProperty.deprecated` | `deprecated-property` | | `staticProperty.notFound` | `non-existent-property` | | `ternary.alwaysFalse` | `impossible-condition` | | `ternary.alwaysTrue` | `redundant-condition` | | `traitUse.deprecatedTrait` | `deprecated-class`, `deprecated-trait` | | `unaryOp.invalid` | `invalid-operand`, `mixed-operand`, `possibly-false-operand`, `possibly-invalid-operand`, `possibly-null-operand` | | `variable.undefined` | `possibly-undefined-variable`, `undefined-variable` |