Two ways to generate random numbers in php

In order to create some contingency in php, we may need to set the values ​​​​of some variables to random. In order to solve this problem, php has built-in functions rand() and mt_rand() functions to solve this problem.

First let’s take a look at the syntax of the mt_rand() function:

mt_rand    ( int $min   , int $max   )

• $min: Optional, the minimum value of the generated number
  

• $max: Optional, the maximum value of the generated number

• Return value: If there is no minimum value and maximum value, a random value will be returned The maximum possible value of a number, if any, between the minimum and maximum values.

Code example:

<?php
echo mt_rand();
echo "<br>";
echo mt_rand(10,100);
?>

输出：
1144620466 //随机不一定相同
12         //随机不一定相同

Note: mt_rand()generates random values ​​faster on average than rand() Four times.

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