变量初始化你如何写
变量初始化你怎么写?
数量少的变量初始化信手拈来
如果数量较多的时候就有点难受了
$a,$b,$c,$d,$e.....
写成这样
$a=0;
$b=0;
$c=0;
$d=0;
$e=0;
....
不好看,不方便,不舒服...
那么你怎么初始化?别告诉我不初始化,关闭错误提示.
------解决方案--------------------
$a=$b=$c=...=0;
$d=$e=...=array();
这样好看点了不? 哈哈 没碰到太多需要初始化的变量了
------解决方案--------------------
如果没有规律那就只能人肉了。有规律还好写。如果从数组中可以用 extract/list;
引用一段:
- PHP code
$my_array = array("a" => "Cat","b" => "Dog", "c" => "Horse"); extract($my_array); echo "\$a = $a; \$b = $b; \$c = $c"; //输出:$a = Cat; $b = Dog; $c = Horse <br><font color="#e78608">------解决方案--------------------</font><br>我不会设计这么多变量哈哈。有几个就老老实实写几行 <br><font color="#e78608">------解决方案--------------------</font><br> php 允许不初始化变量,这表现出了 php 的灵活性、简便性<br>如果一定要初始化,倒不如<br>extract(array_flip(explode(',', 'a,b,c,d,e,f,g,h')));<br><br>$a=0;<br>$b=0;<br>$c=0;<br>$d=0;<br>$e=0;<br>.... 烦!!<br><br>$a=$b=$c=...=0;<br>$d=$e=...=array();也烦!!<br> <br><font color="#e78608">------解决方案--------------------</font><br>等哪天,php 变成编译型语言了,就不烦这个了。那又烦什么呢.... <br><font color="#e78608">------解决方案--------------------</font><br> 不仅要隔行写,而且每行还要加满注释。<br>话说做报表为啥要初始化这么多变量?共享下你的设计呗。<br>我也做过一个自定义的报表功能,选表选字段选关联选条件添加统计添加过滤搜索,好像没有类似说初始化多个变量的需要啊。 <br><font color="#e78608">------解决方案--------------------</font><br>本来人家php设计的时候,就是可以变量啥时候用啥时候定义,不知道。那位哥,把php修正成了一种类似强类型的不伦不类的东西。跟个杂种一样。太不容易了,php程序员苦逼啊 <div class="clear"> </div>

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

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

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

Hot Topics



PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
