Comment déterminer rapidement si un tableau en PHP est constitué exclusivement d'entiers ?

More Concise way to Check for Integer Arrays

Original Question: How to determine if an array contains only integers?

Native PHP Solution:

The array function provides a more concise method to achieve this:

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

This approach utilizes the array_filter() function to create a new array containing only elements that satisfy the is_int() condition. By comparing the original and filtered arrays, we can determine if the original array contained only integers.

Higher-Order Function Helpers:

To enhance flexibility, consider defining helper functions:

<code class="php">function all($elems, $predicate) {
  return !any($elems, $predicate); // true if all validate
}

function any($elems, $predicate) {
  foreach ($elems as $elem) {
    if (call_user_func($predicate, $elem)) {
      return true; // true if any validate
    }
  }

  return false;
}</code>

Now, you can use these functions for more complex scenarios:

<code class="php">all([1, 2, 3], 'is_int'); // true
any([1, 'a', 'b'], 'is_int'); // true</code>

This solution provides a concise and flexible way to verify integer arrays in PHP, catering to various use cases.

Ce qui précède est le contenu détaillé de. pour plus d'informations, suivez d'autres articles connexes sur le site Web de PHP en chinois!