Shulou(Shulou.com)06/02 Report--

This article focuses on "how to define multi-dimensional arrays and get the elements in PHP". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how to define a multi-dimensional array and get the elements in PHP".

Two-dimensional array

As we said above, when the elements in one array are another array, the array that makes up the package function array is a two-dimensional array, which is simply understood as an array of arrays. Is there any difference between the way it is declared and the normal array?

A two-dimensional array is declared in the same way as an one-dimensional array, except that one or more elements in the array are declared as an array, and there are two ways to declare a two-dimensional array by directly assigning values to the array elements or by using the array () function.

Let's take a look at declaring an array by assigning values to array elements directly, as shown in the following example:

Output result:

In the above example, an array is declared by directly assigning values to array elements. Let's take a look at declaring a two-dimensional array through the array () function. The example is as follows:

The output is consistent with the output in the example above.

Next, let's take a look at how to get the elements in a two-digit array through an example, as follows:

Output result:

What we need to note is that the different dimensions of the array indicate that we need to use several subscripts to get the corresponding array elements. for example, a two-dimensional array needs two subscripts to get the corresponding array elements, a three-dimensional array needs three, and so on.

Sometimes we want to save the data with more than one key, so we need to use the multi-dimensional array of PHP. However, sometimes you want to store the value with more than one key. At this point, you can use a multi-dimensional array for storage. Next let's take a look at the multidimensional array.

Multidimensional array

In addition to two-dimensional arrays, PHP also supports three-dimensional arrays, four-dimensional arrays and even more multi-dimensional arrays, which can be collectively referred to as multi-dimensional arrays, but when the array exceeds three dimensions, the readability is greatly reduced and it is not easy to manage.

With reference to a two-dimensional array, you can easily create a three-dimensional array, a four-dimensional array, or other higher-dimensional arrays. Next, let's take a look at how a three-dimensional array is defined through an example, as follows:

Output result:

At this point, I believe you have a deeper understanding of "how to define a multi-dimensional array and get the elements in PHP". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.