Probability Calculation PHP Lucky Star_PHP Tutorial

Given a probability (here is a point), determine whether a certain event occurs.
It can be used to randomly generate website lucky stars based on the points obtained by the user (note: there is an equal word here).
/**
@title:PHP Lucky Star(lucker)
@version:1.00
@license:BSD
@author:axgle
*/

$bl = lucker(50);//50% possibility
var_dump($bl);

function lucker($dot) {
          $dot = intval($dot);
          $dot = max($dot,0);//min dot = 0
          $dot = min($dot,100);//max dot = 100

$one = rand(1,100);
          $total = range(1,100);
         shuffle($total);

$range = array();
for($i=0; $i<$dot; $i++) {
                    $range[] = $total[$i];
}
          return in_array($one,$range);
}
?>

http://www.bkjia.com/PHPjc/508501.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/508501.htmlTechArticleGiven a probability (here is the number of points), determine whether an event occurs. It can be used to determine whether a certain event occurs based on the user's information. Points, randomly generated website lucky stars and other aspects (note: there is an equal word here). ?php /*...