<?php
$id=$_GET;
$arr1 = str_split($id);
$co=count($arr1);
$tosefet=(8-$co);
$con1='0';
for ($con='1';$con<= 9;$con++)
{
  if ($con<=$tosefet)
  $arr2.='0';
  else
  {
  $arr2.=$arr1;
  $con1++;
  }
}
$co2='1';
$arr5 = str_split($arr2);
foreach ($arr5 as $aa)
{
if (($co2%2)!=0)
$arr4.=($aa*1);
if (($co2%2)==0)
$arr4.=($aa*2);
$co2++;
}
$arr6 = str_split($arr4);
$sum=array_sum($arr6);
$max=(ceil($sum/10))*10;
$bik=$max-$sum;
echo "ספרת הביקורת שלך היא  $bik";
?>