Welcome! Today, we will explore an interesting task using PHP arrays: pairing up 'opposite' elements. This lesson aims to improve your array-handling skills within PHP. Arrays are a fundamental tool in PHP, providing an efficient way to store and manipulate collections of data. Are you ready to get started? Let's dive into the world of PHP arrays!

Our task today is to form pairs of 'opposite' elements in a given PHP array of integers. In an array consisting of n elements, the first and last elements are considered 'opposite', the second element and the second-last element are 'opposite', and so on. For an array with an odd length, the middle element is its own 'opposite'.

You will receive an array of n integers. The value of n could range from 1 to 100, inclusive. The task requires you to return an array of strings, where each string consists of an element paired with its 'opposite' element, joined by a space.

For instance, consider an array $numbers as [1, 2, 3, 4, 5]. In this case, the output should be ["1 5", "2 4", "3 3", "4 2", "5 1"].

Let's start by understanding how to access elements in a PHP array.

In PHP, the i-th element of an array can be accessed using , where the index starts from . Consequently, the first element is , the second is , and so on, up to for the last element.