PHP Winning probability algorithm implementation code

Implementation code:

<?php/** *php winning probability algorithm * */function get_zj ($jp, $glname = ' gl ') {    $sum = 0;    foreach ($jp as $k = + $v) {        $sum + = $v [$glname];    }      $R = rand (1, $sum);//Gets the random number      foreach ($jp as $k = $v) {        if ($R <= $v [$glname]) {            return $v;        }        $R = $R-$v [$glname];    }  }    How to use//simulate a winning configuration read from the database  GL for the probability of winning//For example, array (' gl ' = ', ' title ' = ' first prize '); probability of winning =/(10+20+30+40) $JP = Array (); $JP [] = Array (' GL ' = +, ' title ' = ' first prize '); $JP [] = Array (' gl ' = = ', ' title ' = ' Second Prize '); $JP [] = AR Ray (' gl ' = ' + ' title ' = ' third Prize '), $JP [] = Array (' gl ' = ' + ', ' title ' = ' not winning ');    Call the winning probability function//return an array of winning information for example: Array (' gl ' = +, ' title ' = ' first prize '); $ZJ = Get_zj ($JP);  Output array var_dump ($ZJ);

Use method
simulates a winning configuration that is read from a database GL is the probability of winning a prize
For example, the array (' gl ' = ', ' title ' = ' first prize '); probability of winning =/(10+20+30+40)
$j p = Array ();
$jp [] = Array (' GL ' = +, ' title ' = ' first prize ');
$jp [] = Array (' GL ' = +, ' title ' = ' Second Prize ');
$jp [] = Array (' GL ' = +, ' title ' = ' third prize ');
$jp [] = Array (' GL ' = +, ' title ' = ' not winning ');

Call the winning probability function
to return an array of winning information, for example: Array (' gl ' = +, ' title ' = ' first prize ');