我从PHPClasses网站获得了以下ELO类。$S2){$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)/