How to find the area of ​​a rectangle in PHP

How to find the area of ​​a rectangle in PHP

We first open it with Notepad, and then create a class, here It is a rectangle class, and the English word is rectangle. Then we define the method according to the class and write the code like this:

<?php 
class Rectangle{
public $length;
public $width;?
>

and then save it. This defines a class, the rectangle class.

Then we write the constructor method and initialize the rectangle class. Continue writing code:

function __construct($length,$width){
$this->length=$length;
$this->width=$width;
}

The keyword function used here means method. Note that there are two underscores in front of construct [in English]. There are two parameters, one is the length of the rectangle, and the other is the width.

Then we write the method to find the area,

function getmessage(){
    echo &#39;矩形长是&#39;.$this->length."<br />";
    echo &#39;矩形宽是&#39;.$this->width."<br />";
    echo &#39;矩形面积是&#39;.$this->length*$this->width."<br />";
}

}-This right brace is the end of the previous class definition.

Then we use the new keyword to create a new object. The object here is a rectangle, initialized to length 10 and width 5. Then add the code as follows:

$rectangle1=new Rectangle(10,5);

We require the area, just Call the getmessage method just used to find the area. Then add the following code:

$rectangle1->getmessage();

Then we save it and then run it and view the results:

Pay attention to the orientation Object method class definition and method invocation.

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