PHP function: Generate N non-repeated random numbers. php random number _ PHP Tutorial

PHP function: Generate N non-repeated random numbers and php random numbers. PHP function: Generate N random numbers without duplicates. php random number PHP function: Generate N random numbers without duplicates. train of thought: store the generated random number into an array, remove duplicate values in the array. PHP function: Generate N non-repeated random numbers and php random numbers.
PHP function: Generate N random numbers that are not repeated

Idea: store the generated random number into an array, and then remove duplicate values in the array to generate a certain number of non-repeated random numbers.

Program:

 
Note:
1. the mt_rand () function is used to generate random numbers. This function is four times faster than the rand () function;
2. when the array repeated values are removed, the "flip method" is used, that is, the array key and value are exchanged twice with array_flip. It is much faster than array_unique.

How does matlab generate random numbers that are not repeated?
Rand (1, 8) * 100
Ans =
Columns 1 through 7
81.4724 90.5792 12.6987 91.3376 63.2359 9.7540 27.8498
Column 8
54.6882
How to use the if function to generate N random numbers in excel
Select A1: A1000, and enter
= RAND ()
Press CTRL + press Enter]
Select B1: B1000, and enter
= RANK (A1, a $1: A $1000)
Press CTRL + press Enter]
Random number PHP function: Generate N non-repeated random numbers. train of thought: store the generated random number into an array, and then remove repeated values in the array...