test_smtp.php

<?
require("smtp.php");

$smtp=new smtp_class;

$smtp->host_name="mail.xiaocui.com";
$smtp->localhost="localhost";
$from="webmaster@xiaocui.com";
$to="root@xiaocui.com";
if($smtp->SendMessage(
  $from,
  array(
   $to
  ),
  array(
   "From: $from",
   "To: $to",
   "Subject: Testing Manuel Lemos' SMTP class"
  ),
  "Hello $to, It is just to let you know that your SMTP class is working just fine. Bye. "))
  echo "Message sent to $to OK. ";
else
  echo "Cound not send the message to $to. Error: ".$smtp->error." "
?>

smtp.php

<?

class smtp_class
{
var $host_name="";
var $host_port=25;
var $localhost="";
var $timeout=0;
var $error="";
var $debug=1;
var $esmtp=1;
var $esmtp_host="";
var $esmtp_extensions=array();
var $maximum_piped_recipients=100;

/* private variables - DO NOT ACCESS */

var $state="Disconnected";
var $connection=0;
var $pending_recipients=0;

/* Private methods - DO NOT CALL */

Function OutputDebug($message)
{
  echo $message,"<br> ";
}

Function GetLine()
{
  for($line="";;)
  {
   if(feof($this->connection))
   {
    $this->error="reached the end of stream while reading from socket";
    return(0);
   }
   if(($data=fgets($this->connection,100))==false)
   {
    $this->error="it was not possible to read line from socket";
    return(0);
   }
   $line.=$data;
   $length=strlen($line);
   if($length>=2
   && substr($line,$length-2,2)==" ")
   {
    $line=substr($line,0,$length-2);
    if($this->debug)
     $this->OutputDebug("< $line");
    return($line);
   }
  }
}

Function PutLine($line)
{
  if($this->debug)
   $this->OutputDebug("> $line");
  if(!fputs($this->connection,"$line "))
  {
   $this->error="it was not possible to write line to socket";
   return(0);
  }
  return(1);
}

Function PutData($data)
{
  if(strlen($data))
  {
   if($this->debug)
    $this->OutputDebug("> $data");
   if(!fputs($this->connection,$data))
   {
    $this->error="it was not possible to write data to socket";
    return(0);
   }
  }
  return(1);
}

Function VerifyResultLines($code,$responses="")
{
  if(GetType($responses)!="array")
   $responses=array();
  Unset($match_code);

  while(($line=$this->GetLine($this->connection)))
  {
   if(IsSet($match_code))
   {
    if(strcmp(strtok($line," -"),$match_code))
    {
     $this->error=$line;
     return(0);
    }
   }
   else
   {
    $match_code=strtok($line," -");
    if(GetType($code)=="array")
    {
     for($codes=0;$codes<count($code) && strcmp($match_code,$code[$codes]);$codes++);
     if($codes>=count($code))
     {
      $this->error=$line;
      return(0);
     }
    }
    else
    {
     if(strcmp($match_code,$code))
     {
      $this->error=$line;
      return(0);
     }
    }
   }
   $responses[]=strtok("");
   if(!strcmp($match_code,strtok($line," ")))
    return(1);
  }
  return(-1);
}

Function FlushRecipients()
{
  if($this->pending_sender)
  {
   if($this->VerifyResultLines("250")<=0)
    return(0);
   $this->pending_sender=0;
  }
  for(;$this->pending_recipients;$this->pending_recipients--)
  {
   if($this->VerifyResultLines(array("250","251"))<=0)
    return(0);
  }
  return(1);
}

/* Public methods */

Function Connect()
{
  $this->error=$error="";
   $this->esmtp_host="";
   $this->esmtp_extensions=array();
  if(!($this->connection=($this->timeout ? fsockopen($this->host_name,$this->host_port,&$errno,&$error,$this->timeout) : fsockopen($this->host_name,$this->host_port))))
  {
   switch($error)
   {
    case -3:
     $this->error="-3 socket could not be created";
     return(0);
    case -4:
     $this->error="-4 dns lookup on hostname "".$host_name."" failed";
     return(0);
    case -5:
     $this->error="-5 connection refused or timed out";
     return(0);
    case -6:
     $this->error="-6 fdopen() call failed";
     return(0);
    case -7:
     $this->error="-7 setvbuf() call failed";
     return(0);
    default:
     $this->error=$error." could not connect to the host "".$this->host_name.""";
     return(0);
   }
  }
  else
  {
   if(!strcmp($localhost=$this->localhost,"")
   && !strcmp($localhost=getenv("SERVER_NAME"),"")
   && !strcmp($localhost=getenv("HOST"),""))
     $localhost="localhost";
    $success=0;
    if($this->VerifyResultLines("220")>0)
    {
     if($this->esmtp)
     {
      $responses=array();
      if($this->PutLine("EHLO $localhost")
      && $this->VerifyResultLines("250",&$responses)>0)
      {
       $this->esmtp_host=strtok($responses[0]," ");
       for($response=1;$response<count($responses);$response++)
       {
        $extension=strtoupper(strtok($responses[$response]," "));
        $this->esmtp_extensions[$extension]=strtok("");
       }
       $success=1;
      }
     }
     if(!$success
     && $this->PutLine("HELO $localhost")
     && $this->VerifyResultLines("250")>0)
      $success=1;
   }
   if($success)
   {
    $this->state="Connected";
    return(1);
   }
   else
   {
    fclose($this->connection);
    $this->connection=0;
    $this->state="Disconnected";
    return(0);
   }
  }
}

Function MailFrom($sender)
{
  if(strcmp($this-

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