PHP: Method for generating random numbers without duplicates

Source: www.ido321.com1217.html random numbers can be used for Web applications, WAP or mobile applications. In recent small projects, I often need to deal with random numbers or random arrays. Therefore, I would like to summarize several common methods for generating non-repeated random numbers in PHP (ps: method 1, 4, and 5 are my

Source: http://www.ido321.com/1217.html, whether it is Web applications, WAP or mobile applications, random numbers are useful. In recent small projects, I often need to deal with random numbers or random arrays. Therefore, I would like to summarize several common methods for generating non-repeated random numbers in PHP (ps: method 1, 4, and 5 are my

Source: http://www.ido321.com/1217.html

Random numbers are useful for Web applications, WAP or mobile applications. In recent small projects, I often need to deal with random numbers or random arrays. Therefore, I would like to summarize several common methods for generating non-repeated random numbers in PHP (ps: methods 1, 4, and 5 are commonly used, and the rest are from network arrangement)

Method 1:

Method 2:

Method 3:

Five distinct values can be randomly generated between 1 and 20.

Method 4:

Method 5:

This may be simpler (ps: If the step is specified in the range, you must note whether the second parameter of array_rand exceeds the length of $ tmp ).

PHP provides a rich array function, and generates random numbers most of the time from the array perspective. If you have other methods available, please refer to the article for continuous updates.

PHP: Method for generating random numbers without duplicates