<?php

function generateEAN($number)
{
  $code = '80' . str_pad($number, 9, '0');
  $weightflag = true;
  $sum = 0;
  // Weight for a digit in the checksum is 3, 1, 3.. starting from the last digit. 
  // loop backwards to make the loop length-agnostic. The same basic functionality 
  // will work for codes of different lengths.
  for ($i = strlen($code) - 1; $i >= 0; $i--)
  {
    $sum += (int)$code[$i] * ($weightflag?3:1);
    $weightflag = !$weightflag;
  }
  $code .= (10 - ($sum % 10)) % 10;
  return $code;
}

$codice = rand(155687123, 986123548);

for ($i= 1; $i<= 1037; $i++)
{
$codice = rand(155687123, 986123548);    
echo generateEAN($codice). '<br />';

}


?>