Redbean:入门(一),redbean入门
Redbean:入门(一),redbean入门
<?<span>php </span><span>require_once</span> 'rb.php'<span>; </span><span>$tableName</span> = "link"<span>; </span><span>//</span><span>链接数据库</span> R::setup("mysql:host=localhost;dbname=hwibs_model","root",""<span>); </span><span>//</span><span>创建一个表(也可以指为实例化一个表)</span> <span>$handler</span> = R::dispense(<span>$tableName</span><span>); </span><span>#</span><span>#################################### add #####################################</span> <span>/*</span><span>同上[同时实例化多个表] list($handler_1,$handler_2) = R::dispenseALL("test_1,test_2"); </span><span>*/</span> <span>//</span><span>对象方式给字段赋值 //::注意,如果字段不存在,store方法过后,会自动添加对应的字段,并且自动根据字段值设置字段的对应字段类型</span> <span>$handler</span>->name = "haha"<span>; </span><span>$handler</span>->url = "isxiugai"<span>; </span><span>$handler</span>->plushtime = <span>time</span>() - 5000<span>; </span><span>//</span><span>如果有下划线的字段名,则可以使用驼峰法命名,将自动转换为下划线</span> <span>$handler</span>->isMyName = <span>false</span>;<span>//</span><span> = is_my_name //执行,此静态方法会返回添加成功后的自增id值(单个)</span> <span>$inser_id</span> = R::store(<span>$handler</span><span>); </span><span>#</span><span>#################################### query #################################### //获取记录句柄(参数1为表名,参数2为id值),返回值为对象集合 //如果id不存在,则返回0 //注意,这个获取到的句柄,可以用于删除操作</span> <span>$bean</span> = R::load(<span>$tableName</span>,4);<span>//</span><span>获取单个</span> <span>$beans</span> = R::loadAll(<span>$tableName</span>,<span>array</span>(1,2,3,4));<span>//</span><span>获取多个</span> <span>#</span><span>#################################### update ##################################### //1.注意,修改跟add的唯一区别就是id,如果id不为空,则为修改,否则则为添加! //2.如果id不存在的情况下,既不会添加,也不会修改!所以一般在修改前,需要事先用load进行判断是否存在</span> <span>foreach</span> (<span>$beans</span> <span>as</span> <span>$k</span>=><span>$v</span><span>){ </span><span>$beans</span>[<span>$k</span>]->url = <span>rand</span>(100,5555);<span>//</span><span>测试[循环将每个记录对象中的url赋值一个随机数]</span> <span> } R</span>::storeAll(<span>$beans</span>);<span>//</span><span>执行修改</span> <span>#</span><span>#################################### delete ##################################### //删除单个::成功或失败都是返回null</span> <span>var_dump</span>(R::trash(R::load(<span>$tableName</span>,1<span>))); </span><span>//</span><span>删除多个::如果有不存在的,则会只删除存在的,成功或失败都是返回null</span> <span>var_dump</span>(R::trashAll(R::loadALL(<span>$tableName</span>,<span>array</span>(117,118<span>)))); </span><span>#</span><span>#################################### other ##################################### //清除表中所有数据::相当于truncate,因为会将自增指针重置 //R::wipe($tableName); //删除数据库中所有的表,[无语的功能,要这个搞毛] //var_dump(R::nuke()); //关闭链接</span> R::<span>close(); </span>?>
不算是error,没什么影响,工程设置的问题
《Verilog数字系统设计教程(第二版)》 夏宇闻 这是语法基础 这本有电子版
《深入浅出玩转FPGA(内附光盘一张)》 吴厚航 这本书有视频教程 经验之谈
《Altera FPGA/CPLD设计(基础篇)(第2版)》 这本包含了altera器件介绍和quartus使用
《Altera FPGA/CPLD设计(高级篇)(第2版)》 FPGA设计的高级技能
《设计与验证Verilog HDL》 吴继华,王诚 这书不错,看电子版就好了 经验之谈
《高级FPGA设计结构、实现也优化》(美)克里兹 著,孟宪元 译 据说很高级

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

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

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

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,

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

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

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.
