<?php
function base64decode($base64)
{
  $table64_inverse = array_flip(str_split('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'));
 
  $string = 'U2FsdXQsIGplIHN1aXMgdW5lIHBocmFzZSBkZSB0ZXN0LiAoTmUgdHJvdXZlei12b3VzIHBhcyBjZWzDoCBleHRyYW9yZGluYWlyZSA/KSBAKys=';
  $bin = $binlen = 0;
  $strlen = strlen(rtrim($base64, '='));
  for ($i = 0; $i < $strlen; $i++)
    {
      $bin <<= 6;
      $bin |= $table64_inverse[$base64[$i]];
      $binlen += 6;
      if ($binlen >= 8)
	{
          $binlen -= 8;
	  $string .= chr($bin >> $binlen);
	  $bin &= (1 << $binlen) - 1;
	}
    }
 
  return $string;
}
?>

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