PHP Random Number Generation and usage Parsing

In the previous article, we introduced how to use
Seven results are displayed after the second operation.

Maybe you will ask, can PHP random numbers only do these boring things? Rand () doesn't seem so important. If you're wrong, think about the ubiquitous verification code, the extraction and allocation of random articles in some CMS systems. Random Numbers play an important role in these applications; in addition, in the security and algorithm fields, many applications of random numbers are also worth further research, such as encryption and the same-remainder method structure.