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Is there an atomic way to check if the value exists by a key AND return the value, so there will be just one query to the array? I think that this was the original idea of the author of the question. In a very large array, all examples here have shown essentially too lookup: for example array_key_exists('possible_key', $array) ? $array etc.A better way would be a single operation with the array that would not give a PHP run time warning in the key does not exist.Unfortunately, PHP does not have an atomic check-and-lookup. So, the answer to the author's question is "NO, this is not possible in PHP to check and lookup in one operation".However, on the question of "is there a better way to be writing this", the answer is "YES, you can avoid repeating string literals and use ternary operator, but there still be two operations with the array". Sometimes we need to search in an array or multidimensional array by key or value without using any function.If you want to access an individual value form an indexed, associative or multidimensional array you can either do it through using the array index or key.arraykeys() returns the keys, numeric and string, from the array.

You can also specify a value, so that array_keys() returns only those keys whose value matched this value.Array_keys() function returns keys as an indexed array. The PHP array_keys() function returns keys of a given array. Your comment will help us for help you more and improve us. If you need any help or any feedback give it in comment section or you have good idea about this post you can give it comment section.