search
HomeBackend DevelopmentPHP TutorialSimple examples of using traits in PHP, phptraits examples_PHP tutorial

A simple example of using traits in PHP, an example of phptraits

The traits in PHP 5.4 are newly introduced features, and I really don’t know how to translate them accurately into Chinese. Its actual purpose is to use multiple inheritance in some situations, but PHP does not have multiple inheritance, so such a thing was invented.
Traits can be understood as a set of methods that can be called by different classes, but traits are not classes! Cannot be instantiated. Let’s take an example to look at the syntax first:

<&#63;php
trait myTrait{
  function traitMethod1(){}
  function traitMethod2(){}

}

//然后是调用这个traits,语法为:
class myClass{
  use myTrait;
}

//这样就可以通过use myTraits,调用Traits中的方法了,比如:
$obj = new myClass();
$obj-> traitMethod1 ();
$obj-> traitMethod2 (); 
>

Next, let’s explore why traits are used. For example, there are two classes, business and Individual. They both have address attributes. The traditional approach is to Abstract a parent class that both classes have common characteristics, such as client, and set the access attributes address, business and individual in the client class to inherit them respectively, as shown in the following code:

// Class Client 
class Client { 
  private $address; 
  public getAddress() { 
    return $this->address; 
  }    
  public setAddress($address) { 
    $this->address = $address;  
  } 
} 
   
class Business extends Client{ 
  //这里可以使用address属性 
} 

// Class Individual 
class Individual extends Client{ 
//这里可以使用address属性 
} 

But what if there is another class called order that needs to access the same address attribute? The order class cannot inherit the client class because this does not comply with the principles of OOP. Traits come in handy at this time. You can define a trait to define these public properties.

// Trait Address
trait Address{
  private $address;
  public getAddress() {
    eturn $this->address;
  }
  public setAddress($address) {
    $this->address = $address;
  }
}
// Class Business
class Business{
  use Address;
  // 这里可以使用address属性
}
// Class Individual
class Individual{
  use Address;
  //这里可以使用address属性
}
// Class Order
class Order{
  use Address;
  //这里可以使用address属性
}   

This is much more convenient!

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/998800.htmlTechArticleA simple example of using traits in PHP, phptraits example Traits in PHP 5.4 is a newly introduced feature, and it is also available in Chinese I really don’t know how to translate it accurately. Its actual purpose is to provide some occasions...
Statement
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
php怎么把负数转为正整数php怎么把负数转为正整数Apr 19, 2022 pm 08:59 PM

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

php怎么实现几秒后执行一个函数php怎么实现几秒后执行一个函数Apr 24, 2022 pm 01:12 PM

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php字符串有没有下标php字符串有没有下标Apr 24, 2022 am 11:49 AM

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

php怎么除以100保留两位小数php怎么除以100保留两位小数Apr 22, 2022 pm 06:23 PM

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

php怎么根据年月日判断是一年的第几天php怎么根据年月日判断是一年的第几天Apr 22, 2022 pm 05:02 PM

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php怎么读取字符串后几个字符php怎么读取字符串后几个字符Apr 22, 2022 pm 08:31 PM

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

php怎么替换nbsp空格符php怎么替换nbsp空格符Apr 24, 2022 pm 02:55 PM

方法:1、用“str_replace("&nbsp;","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\&nbsp\;||\xc2\xa0)/","其他字符",$str)”语句。

php怎么查找字符串是第几位php怎么查找字符串是第几位Apr 22, 2022 pm 06:48 PM

查找方法:1、用strpos(),语法“strpos("字符串值","查找子串")+1”;2、用stripos(),语法“strpos("字符串值","查找子串")+1”。因为字符串是从0开始计数的,因此两个函数获取的位置需要进行加1处理。

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.