Fix to solve the problem when local_part is null

Fixed a bug in php8.1 in rfc822_addresses.php to solve the problem when local_part is null

Function ParseAddrSpec(&$p, &$addr_spec)
{
$addr_spec = null;
$v = $this->v;
$l = strlen($v);
$a = $p;
if(!$this->ParseQuotedString($a, $local_part))
return(0);
if(!IsSet($local_part))
{
if(!$this->ParseAtom($a, $local_part, 1))
return(0);
// BEGIN TO SOLVE THE PROBLEM WHEN LOCAL_PART IS NULL IN PHP8.1 BY SANZ
if(!IsSet($local_part))
return(1);
// END TO SOLVE THE PROBLEM WHEN LOCAL_PART IS NULL IN PHP8.1 BY SANZ
$local_part = trim($local_part);
}
if($a >= $l
|| strcmp($v[$a], '@'))
return(1);
++$a;
if(!$this->ParseAtom($a, $domain, 1))
return(0);
if(!IsSet($domain))
return(1);
$addr_spec = $local_part.'@'.trim($domain);
$p = $a;
return(1);
}

Hello Josep,

Great. Can you provide an example address that I can use to create a test to verify the issue?

This should throw an error with all addresses.

In ParseAddressList() you have
$p = 0;
if(!$this->ParseAddress($p, $address))
In ParseAddrSpec(), this goes to this function
$a = $p;
if(!$this->ParseQuotedString($a, $local_part))
And in Function ParseQuotedString(&$p, &$quoted_string)
$quoted_string = null;
$s = $p;
if($s >= $l
|| strcmp($v[$s], '"'))
return(1);
Which will leave $local_part as NULL.
if(!IsSet($local_part))
{
$local_part = trim($local_part);
This will do trim(null) and fail.

Great. Let me try to check that over the weekend.

Hello,

I need a sample message that I can use to reproduce the issues, so I can verify if the fix works correctly.

Can you provide a sample message that I can use to test this issue?