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原文：
A summary of the literature
Abstract
On January 9, 2017, WeChat applet was officially launched. Different from APP, it is embedded in WeChat, which realizes the idea that users dont need to download, reach at their fingertips, and leave after using it. Users can find it by scanning code or searching. As a form of small program, WeChat small program mall helps the offline industry to develop online. All kinds of retailers have established connections with users, forming an online and offline linkage, and applications with low frequency of use can also have room for development. Compared with JD.COM, Taobao and other e-commerce platforms APP, the development cost of WeChat small program mall is lower, and merchants can devote more energy to guiding users into small programs and gain more profits. For merchants, they can make personalized business cities to meet the personalized needs of users. Small program mall cant be promoted like APP, and can only be obtained by active search or sharing with others, so it is very important to form customer stickiness with consumers. On this basis, it is necessary to constantly optimize the customers user experience in order to retain old customers and attract new customers.
Development platform: WeChat developer tool, VSCODE,PHPSTORM
Background
E-commerce is the business communication between buyers and sellers under the background of Internet. With the change of peoples shopping concept and the development of mobile internet, e-commerce is more and more popular with the public. According to the Ministry of Commerce, Chinas e-commerce transaction volume will reach 40 trillion yuan in 2020. E-commerce is fast and efficient, with a wide choice of shopping, and a relatively good price. In addition, the logistics system which is gradually becoming perfect has greatly promoted e-commerce transactions. At present, there are many e-commerce trading platforms, and relatively large e-commerce trading platforms, such as Taobao, JD.COM, Amazon and other platforms, are mainly businesses facing customers, equivalent to department stores; Some e-commerce platforms are mainly engaged in one or several types of products, such as Dangdangs main books; Some electronic sub-business platforms are mainly engaged in the companys products. At present, similar e-commerce platforms can basically be found in various industries. From the perspective of technology implementation, e-commerce platforms include Web site platform, mobile APP application and the latest WeChat applet. The Web site platform is more suitable for PC operation such as computers, and the mobile APP application is suitable for intelligent terminal operation. These two forms occupy the main stream position in the e-commerce trading platform, but with the launch of WeChat applet application in 2017, because of its advantages of simple operation, clear flow process, no need to install, and no occupation of system space, they are gradually loved by users. The purpose is to develop an e-commerce platform for selling fruits and vegetables based on WeChat, which can effectively promote related products and increase farmers income in rural areas with relatively low informatization popularity.
Brief introduction of PHP and my SQL
PHP is an embedded scripting language, which can be combined by modules and web servers, and can provide various database interfaces, such as my SQL,MSQL,sybase and so on. In addition, its sentences are very similar to languages such as P e r l, so it is easier for beginners to learn this foot language. P H P is a kind of server-side language. PHP is different from the client language. The main function of PHP is calculation, and the calculation results can be transmitted to the client, so P H P is often used in transaction processing. In addition, P H P is also a cross-platform language, which can deliver results to browsers. PHP can be used across platforms and on any browser. It is an open source program, which can be used in commercial or non-commercial fields. The most important point is that it is free. The opening of P H P makes it inferior to other server languages. Moreover, the execution effect of P H P is also very good. Generally, browsers can only recognize the language on the client, but P H P is different. PHP can directly interpret the language and then transmit the interpreted language to the client. When the client reads the PHP file, it will automatically start to interpret it, then change it into HTML format and transmit it to the web server. Finally, the web server will send the interpreted format back to the browser of the client. It has been said that PHP belongs to an embedded language, so we want to use the corresponding two command symbols to command the PHP interpreter when it needs to insert PHP code to identify files. My SQL is a relatively standard database server. In 1970, IBM Research Center developed the original SQL, which was specially used to query data. Generally speaking, we use this language to create tables, define data, and add or change data at any time. This language is colloquial. SQL is now the most standard database language. In the past, most of the data were stored in the form of text files, but such storage had serious shortcomings. For example, when the computer opens and closes files, the whole process consumes more resources. However, there will be thousands of people using the server in the network system, so the speed of the computer will definitely decre
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