我从PHPClasses网站获得了以下ELO类。
<?php
class elo_calculator {
public function rating($S1, $S2, $R1, $R2) {
if(empty($S1) or empty($S2) or empty($R1) or empty($R2))
return null;
if($S1 != $S2) {
if($S1 > $S2) {
$E = 120 - round(1 / (1 + pow(10, (($R2 - $R1) / 400))) * 120);
$R['R3'] = $R1 + $E;
$R['R4'] = $R2 - $E;
} else {
$E = 120 - round(1 / (1 + pow(10, (($R1 - $R2) / 400))) * 120);
$R['R3'] = $R1 - $E;
$R['R4'] = $R2 + $E;
}
} else {
if($R1 == $R2) {
$R['R3'] = $R1;
$R['R4'] = $R2;
} else {
if($R1 > $R2) {
$E = (120 - round(1 / (1 + pow(10, (($R1 - $R2) / 400))) * 120)) - (120 - round(1 / (1 + pow(10, (($R2 - $R1) / 400))) * 120));
$R['R3'] = $R1 - $E;
$R['R4'] = $R2 + $E;
} else {
$E = (120 - round(1 / (1 + pow(10, (($R2 - $R1) / 400))) * 120)) - (120 - round(1 / (1 + pow(10, (($R1 - $R2) / 400))) * 120));
$R['R3'] = $R1 + $E;
$R['R4'] = $R2 - $E;
}
}
}
$R['S1'] = $S1;
$R['S2'] = $S2;
$R['R1'] = $R1;
$R['R2'] = $R2;
$R['P1'] = ((($R['R3'] - $R['R1']) > 0)?"+" . ($R['R3'] - $R['R1']) : ($R['R3'] - $R['R1']));
$R['P2'] = ((($R['R4'] - $R['R2']) > 0)?"+" . ($R['R4'] - $R['R2']) : ($R['R4'] - $R['R2']));
return $R;
}
}
?>
我正在尝试将其应用于我的食品评估网站。
这是我的理解
这与PHP的实现相同。您能帮助我理解这四个变量吗,我应该如何使用它?
最佳答案
在GitHub上,这是我找到的ELO评级系统的最佳php类:https://github.com/Chovanec/elo-rating
用法:
// player A elo = 1000
// player B elo = 2000
// player A lost
// player B win
$raging = new Rating(1000, 2000, 0, 1);
// player A elo = 1000
// player B elo = 2000
// player A draw
// player B draw
$raging = new Rating(1000, 2000, .5, .5);