Home php教程 php手册 如何利用PHP数组打印下标

如何利用PHP数组打印下标

Jun 13, 2016 am 11:05 AM
php subscript introduce use how study Will Print array hour meet question

学习PHP数组时,你可能会遇到很多问题,这里将介绍PHP数组问题的解决方法,在这里拿出来和大家分享一下。开始学习php了。一直主观的认为编程是指用C,C++之类的语言写应用程序。对于网页从来都是敬而远之。但是作为系统管理员,如果要维护的网站是php的话,光能解决系统问题还是不够的,为了解决应及之需还是需要能看懂一些php语法的。

所以就“偷偷”的看php了。在学习过程中发现,php 也可以写脚本。这样不是两全其美么?我只学习php写脚本的这部分,用来进行系统管理,这样就可以熟悉php语法,在必要的时候修改一些网页了。不知道用 php脚本作系统管理,我是不是第一人,嘿嘿,能解决问题就是王道嘛。

因为工作流程原因,同事写了东西以后,需要我更新到服务器上,然后同事再看效果。这样操作是没啥问题的。但是对于同事来说,可能每次修改一些东西,总要“麻烦”我,自己会觉得过意不去。而我呢,为了省事儿,把同事让我做的东西,写了一个脚本,他让我更新的时候,我连接服务器,直接执行脚本就OK了。

于是我在想:怎样让同事能够直接进行这件事儿,而不经过我呢?在服务器上开权限是不现实的,因为服务器管理权限越小越好。在部门老大提议写个页面让同事自己做这件事儿的时候,我说我已经有这个想法了,但是流程都通了就不会写页面点击的按钮。老大说,这个简单,于是,过来三个五除二,一个只有一个按钮,点击后可以把执行结果输出的页面就写好了。而且这个按钮可以不限次数的点击。这样就省去了每次重新访问这个页面的麻烦。给了同事用了以后,你猜怎么样?同事竟然激动的说:“你这个小创新,真是造福全人类啊!”哈哈,我虽然嘴上没说啥,其实心里早乐开了花。这也算是我初学php的一点小的激励吧,加油!

废话半天,其实我就是想跟大家分享php咋打印数组下标。当我看到php的foreach函数的时候,觉得它跟perl的foreach有一拼,但是当我打开一个文件并输出的时候,我希望能打印出每行的标号。perl有N多的内置函数,实现这个功能用$.就可以了。难道php实现不了?搜索了半天无果,问了几个写php的朋友也只是说要提前定义一个变量,然后打印这个变量。看来是没办法了,于是继续往下看语法。看到二维数组的时候。有一次不小心把一个一维数组按照二维数组的写法打印了出来,于是乎发现了,这个不可不说的秘密!看图:

498)this.width=498;' onmousewheel = 'javascript:return big(this)' onclick='window.open("http://blog.php100.com/viewpic.php?refimg=" + this.src)' alt=PHP数组 src="http://www.bkjia.com/uploadfile/2013/0904/20130904094734447.jpg" border=0>


内容不用说了吧,先创建一个由十个数字组成的PHP数组,然后输出结果。

498)this.width=498;' onmousewheel = 'javascript:return big(this)' onclick='window.open("http://blog.php100.com/viewpic.php?refimg=" + this.src)' alt=数组下标 src="http://www.bkjia.com/uploadfile/2013/0904/20130904094734660.jpg" border=0>

看到执行结果没?是不是正确打印了数组下标?看来php也很强大嘛,很黄很暴力的说。今天分享就到这了,算不上小甜点,充其量也就是旁门左道:)


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

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

Video Face Swap

Video Face Swap

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

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

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

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

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

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

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,

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

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

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

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

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

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 PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM

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.

PHP and Python: Comparing Two Popular Programming Languages PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

See all articles