What is a php two-dimensional array? Detailed explanation of php two-dimensional array examples

What is a php two-dimensional array?

A two-dimensional array is also called a matrix. It is essentially an array with arrays as array elements. If the elements of an array are one-dimensional arrays, then we call the array a two-dimensional array.

Detailed explanation of PHP two-dimensional array examples

Our previous article "Types of PHP arrays-multidimensional arrays" 》There is an explanation of two-dimensional arrays. The text description may make everyone more confused as you read it. Without code examples, it is intuitive. Below we give specific examples to make it clear to everyone!

PHP two-dimensional array code example:

<?php
header("Content-Type:text/html; charset=utf-8");
$atr = array(
    "网站"=>array("PHP","中文","网"),
    "体育用品"=>array("M"=>"足球","N"=>"篮球"),
    "水果"=>array("橙子",8=>"葡萄","苹果")
);               //声明数组
print_r($atr);  //打印输出数组
?>

The output result is:

Array (
[网站] => Array (
[0] => PHP
[1] => 中文
[2] => 网 )
[体育用品] => Array (
[M] => 足球
[N] => 篮球 )
[水果] => Array (
[0] => 橙子
[8] => 葡萄
[9] => 苹果 )
)

Here is the explanation:

Many people saw above why "Apple" is "9" in the table below?

We have mentioned this issue in previous articles. The array subscript starts from 0 by default, and then increases by 1 in sequence. Of course, you can also specify to start from a certain number, because we "Grapes" was defined as 8 earlier, so the subscript of "apple" later is naturally 9. Do you guys understand now?

The above example implements the declaration of a two-dimensional array. According to this idea, you can declare a higher-dimensional array. Isn’t it very simple? If there are some problems with arrays of more than two dimensions, If you don’t understand, you can refer to our previous article "Types of PHP Arrays-Multidimensional Arrays"!

【Related tutorial recommendations】

1. Relevant topic recommendations: "php array (Array)"

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