Home > Backend Development > PHP Problem > How to define a two-dimensional array in php

How to define a two-dimensional array in php

王林
Release: 2023-05-23 13:30:08
Original
1030 people have browsed it

In PHP, defining a two-dimensional array is actually defining an array, and each element in the array is still an array. Let's take a look at how to define a two-dimensional array in PHP.

Define the basic format of a two-dimensional array:

$array = array(
    array(value1, value2, value3, …),
    array(value1, value2, value3, …),
    array(value1, value2, value3, …),
    …
);
Copy after login

where $array is the array name, value1, value2, value3, etc. are all the values ​​of the array elements. In a two-dimensional array, the values ​​of the array elements are also arrays, so they also have their own subscripts.

Let’s look at an example below, using a two-dimensional array to represent student information in a class. Each student's information includes name, age, gender, grades, etc.

// 定义班级学生信息的二维数组
$students = array(
    // 学生1的信息
    array('name' => '张三', 'age' => 18, 'gender' => '男', 'score' => array(78, 88, 92)),

    // 学生2的信息
    array('name' => '李四', 'age' => 19, 'gender' => '女', 'score' => array(85, 92, 86)),

    // 学生3的信息
    array('name' => '王五', 'age' => 20, 'gender' => '男', 'score' => array(90, 94, 87)),

    // 学生4的信息
    array('name' => '赵六', 'age' => 19, 'gender' => '女', 'score' => array(91, 95, 89))
);

// 取出学生1的成绩
echo $students[0]['score'][0];   // 输出 78
Copy after login

In the above code, we define a two-dimensional array $students, which contains four elements, each element is an array containing student information. The array of each student's information has four elements, namely name, age, gender and grades, where the grades are another array.

If we want to get the score of student 1, we can use $students[0]['score'][0], where $students[0] means The first element in the array is the information array of student 1. ['score'] represents the element named score in this array, [0] represents the element in the score array the first element of .

To summarize, the basic format for defining a two-dimensional array is array(array(value1, value2, value3, …), array(value1, value2, value3, …), …), Each array element is an array, the subscript of the array element can be a number or a string, and the value of the element can be of any type, including arrays. When accessing two-dimensional array elements, you can use the form [index1][index2] to access each array element in turn.

The above is the detailed content of How to define a two-dimensional array in php. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template