This function retrieves the first key of the provided array. It does not affect the pointer's position within the array.

It counts the number of times a value appears in the provided array and returns an associative array where the keys are the values from the provided array, and the values are the number of times the value appears in the provided array.

We can use the count function on an array to count all its elements. It can also be used on an object, but the object must implement the Countable interface. For example:

The array_chunk function is responsible for dividing a provided array into chunks or parts. It will return a new array, which will be the one that is divided into segments as the result.

It returns all the keys in a new array; this will be an indexed array. If you use $search_value in the parameters, it will return an array that contains a subset of keys with that value.