PHP implements the method of randomly sorting data according to weight, PHP implements sorting_PHP tutorial

php implements the method of randomly sorting data according to weight, php implements sorting

The example in this article describes the method of randomly sorting data according to weight in PHP. Share it with everyone for your reference.

The specific implementation method is as follows:

Copy code The code is as follows:

/**
* @param array $weight weight For example array('a'=>10,'b'=>20,'c'=>50)
* @return string key Key name
​*/
function roll($weight = array()) {
$roll = rand ( 1, array_sum ( $weight ) );
$_tmpW = 0;
$rollnum = 0;
foreach ( $weight as $k => $v ) {
$min = $_tmpW;
$_tmpW += $v;
$max = $_tmpW;
if ($roll > $min && $roll <= $max) {
$rollnum = $k;
Break;
}  
} 
Return $rollnum;
}

$row=roll(array('a'=>10,'b'=>20,'c'=>50));
echo $row;
?>

I hope this article will be helpful to everyone’s PHP programming design.

http://www.bkjia.com/PHPjc/940497.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/940497.htmlTechArticlephp method to implement random sorting of data according to weight, php to implement sorting This article tells the example of php to implement random sorting of data according to weight method. Share it with everyone for your reference. Specific actual...