Is there a concise method to verify the presence of exclusively integer elements in an array using PHP\'s built-in functions?

Concise Array Verification for Integer Elements

Verifying the exclusive presence of integers within an array is a common task. While conventional iterative methods can suffice, PHP offers an elegant and concise solution using the array_filter function.

Consider the following approach:

<code class="php">$only_integers = array_filter($only_integers, 'is_int');
$letters_and_numbers = array_filter($letters_and_numbers, 'is_int');</code>

In this code, the array_filter function is employed with the is_int callback to remove non-integer elements from the array. The resulting value is a filtered array that contains only integers, confirming the presence or absence of non-numeric characters.

The array_filter function takes an array and a callback function as arguments. The callback function is applied to each element of the array, and returns a boolean value indicating whether the element should be included in the filtered array. In this case, is_int returns true if the element is an integer and false otherwise.

Boolean Output Demonstration:

<code class="php">var_dump($only_integers); // true
var_dump($letters_and_numbers); // false</code>

By leveraging this concise approach, you can efficiently determine whether an array contains only integers, streamlining your code and enhancing its readability.

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