check array key if the return array has keys describte in doc: for validation of returned array

I want to validate array field which is as describe in document of someone give me. for covering error. if returned array has not field describe in document show messages etc. which field is missing .please recommend me which class is suitable to use.

by zinsou A.A.E.Moïse 3440 - 21 hours ago (2017-08-17) Comment

Instance methods: "set an array value" "set an array value via dot-notation" "get an array value" "get an array value via dot-notation" "get the array" "delete an array value" "check if an array value is-set" "simple loop with an Arrayy-object" append prepend at average chunk clean clear customSortKeys customSortValues contains containsKey diff diffReverse diffRecursive each exists filter filterBy find first firstsMutable firstsImmutable flip getColumn getIterator implode initial intersection intersects isAssoc isMultiArray keys last lastsImmutable lastsMutable length max matches matchesAny mergeAppendKeepIndex mergePrependKeepIndex mergeAppendNewIndex mergePrependNewIndex min randomKey randomKeys randomValue randomValues randomImmutable randomMutable randomWeighted reduce reindex reject remove removeFirst removeLast removeValue replace replaceAllKeys replaceAllValues replaceKeys replaceOneValue replaceValues rest reverse searchIndex searchValue sort sorter sortKeys sortValueNewIndex sortValueKeepIndex split shuffle toJson unique values * walk