Youpai digital currency system

1. The digital development of money is an inevitable trend in the use of money, and it is also the internal demand of money when performing its monetary function

2. Block Tianyan: digital currency is an alternative currency in the form of electronic currency (which can be used for real goods and services transactions). In short, it is the electronization of RMB, which is equivalent to paper currency, but more flexible than paper currency. It can track the flow of your money and pay without the Internet
digital currency has the main characteristics of network packet. This kind of data packet is composed of data code and identification code. The data code is the content we need to transmit, while the identification code indicates where the data packet comes from and goes
based on the characteristics of digital money, the direct benefit of digital money to the central bank is not only saving the cost of paper money issuance, circulation and settlement, but also enhancing the central bank's ability to control funds.

3.

Due to the continuous popularity of bitcoin, people begin to pay close attention to this kind of digital currency. However, people from all walks of life pay more attention to the technical architecture behind bitcoin - blockchain technology, which is considered by many organizations to be the core technology most likely to trigger the fifth round of scientific and technological revolution after steam engine, power, information and Internet technology

bitcoin may fall, while the long-term direction of digital currency is bound to rise, and the rise will be particularly fierce. In 2017, the total market value of global digital currency was only US $647 billion, less than 10% of the global physical gold market value, and less than 0.01% of the total national stock value. AAC is launched at the right time. Miners all know that the earlier they enter, the more tokens they can get and the more profits they can earn. The birth of acute angle cloud will bring huge returns to its partners

2017 can be regarded as the first year of blockchain technology, and 2018 is likely to be the explosive year of blockchain technology. The rapid development of the blockchain technology will probably usher in the explosive growth of acute angle cloud, and the acute angle PC released on ces2018 is likely to become another explosive proct of blockchain

4.

China's digital currency is as long as there is a mobile phone, no network, as long as the touch can be paid, and with detailed transaction records, it is very helpful to combat money laundering crime; This currency is mainly aimed at grabbing shares for Alipay, WeChat and POS terminals. It can also pave the way for RMB internationalization. Digital currency is not only safe and endorsed by the state, but the global central bank is pushing digital money. Now the digital currency is still in the testing stage. What time will it be popularized? It will have to wait until the Beijing Winter Olympic Games in February 2022 to fully promote the use

China's central bank's digital currency can be used for daily micro payments. Because it will be more stable with the endorsement of the state, the central bank's digital currency is different from bitcoin and Libra launched by Facebook. I give digital currency legal effect, and indivials can't refuse to accept it. At the same time, it is very convenient to use. It can be paid without binding any bank account. Digital currency will not cause inflation. Now it can be implemented and used in Shenzhen, xiong'an, Cheng, Suzhou and other cities. It also shows that the era of paperless is coming. Digital currency is a new concept with high technology content. In the future, RMB will enter the 3.0 era. Although the current digital currency is more powerful, it is still unable to put an end to money laundering and corruption

5. Well, this is the answer given by my teacher

A: filter some common database operation keywords,
select, insert, update, delete, and, * etc., or filter the content through the system function addslashes
register in PHP configuration file_ globals=off; Set to off state. (the function will close the registered global variables); If receiving the value of post form, use$_ POST[' user'], If it is set to on, the value will be received by $user.
when writing SQL statements, try not to omit small quotation marks (the one above tab) and single quotation marks.
improve the skills of database naming, and name some important fields according to the characteristics of the program, so that they are not easy to be guessed.
encapsulate common methods to avoid directly exposing SQL statements.
Open PHP safe mode_ Mode = on
Open magic_ quotes_ GPC is used to prevent SQL injection. It is turned off by default. When it is turned on, it automatically converts the SQL query statement submitted by the user to & quot&# 39;& quot; Convert to & quot&# 92;&# 39;& quot;
control the output of error message, close the error message prompt, and write the error message to the system log
preprocess with mysqli or PDO

6. Some digital currencies have been used, and they will soon circulate throughout the country.

7. Multi currency wallet is a foundation, just like depositing money in the bank
there are many ways for these digital currencies to circulate, consume and use on the basis of this wallet
or for people to ask what to deposit this digital currency in this wallet
there are simple Multi Chain wallets, but they provide high security protection. There are some fund game systems to package them. There are simple games played with digital currency. You can exchange mainstream digital currency for your own platform currency for rebate and so on. It's too much to talk about

8. Management and restraint depend on big policies