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How to use random numbers in PHP

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Release： 2016-08-08 09:33:38
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How to use random numbers in PHP

I want to make a web page that appears randomly, but using rand() doesn't work. I heard that random numbers need to be initialized, but how to initialize them? Please give me some advice, thank you!


//The first step: initialize the seed
$seedarray =microtime();
$seedstr =split(" ",$seedarray,5);
$seed =$seedstr[0]*10000;

//Step 2: Initialize the random number generator using the seed
srand($seed);

//Step 3: Generate random numbers within the specified range
$random =rand(10,40);

The above introduces the method of using random numbers in PHP, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.

Related labels：
php rand SEED
source：php.cn
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