The example in this article describes the usage of namespace use in php. I share it with you for your reference, the details are as follows:
Now it feels a bit outdated to say this, but I feel that not many people use namespace, probably because they are not used to it.
Class organizes functions one by one, and namespace can be understood as organizing classes, functions, etc. in an orderly manner. Personally, I think the main advantages of namespace are
First, it can better manage the code
Second, with more files, duplicate names of classes and functions can be avoided
Third, code readability is enhanced
1. Definition namespace
namespace userCenter; //php代码 namespace userCenter\register; //php代码 namespace userCenter\login { //php代码 }
Namespace cannot be nested or declared multiple times in the same code (only the last one will be recognized). However, you can define multiple namespaced codes in the same file. It is more appropriate to define a namespace for each file (it can be the same namespace).
2. Call namespace
\userCenter\register; //绝对调用 userCenter\login; //相对调用 use userCenter\register; //引用空间 use userCenter\register as reg; //引用空间并加别名
3. Example description
login.class.php
"; } class login{ public function save(){ echo "login had saved<br>"; } } ?>
regist.class.php
"; } class regist{ public function save(){ echo "regist had saved<br>"; } } } ?>
test.php
save(); echo regist\check_username(); //相对调用 echo reg\check_username(); //别名调用 $regist = new reg\regist(); echo $regist->save();
Use use, than Absolutely The call should be better, such as adding a prefix to class, function, etc., so that it looks clearer.
I hope this article will be helpful to everyone in PHP programming.
The above introduces the analysis of namespace use usage in PHP, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.

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”。

function是函数的意思,是一段具有特定功能的可重复使用的代码块,是程序的基本组成单元之一,可以接受输入参数,执行特定的操作,并返回结果,其目的是封装一段可重复使用的代码,提高代码的可重用性和可维护性。

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。

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判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。

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。

转化方法:1、使用“mb_substr($url,stripos($url,"?")+1)”获取url的参数部分;2、使用“parse_str("参数部分",$arr)”将参数解析到变量中,并传入指定数组中,变量名转为键名,变量值转为键值。


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Dreamweaver CS6
Visual web development tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool
