How to implement a simple probability in php

This article mainly introduces a simple probability-related code implemented in PHP. It analyzes the principles and usage skills of probability statistics through numerical operations. Friends in need can refer to it

The details are as follows:

<?php
for($i=1;$i<100000;$i++){
$x=mt_rand(0,100);
if($x<20){
$a=$a+1;
}
else{
if($x<50){
$b=$b+1;
}
else{
$c=$c+1;
}
}
}
echo $a . &#39;<br />&#39;;
echo $b . &#39;<br />&#39;;
echo $c . &#39;<br />&#39;;
?>

Output result:

19589
29795
50615

The key is mt_rand(0,100)

Pass $a $b The number of occurrences of $c reflects the probability

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