Bonjour voici le message d'erreur qui apparait :
Notice: Undefined offset: 0 in D:\Program Files\EasyPHP 2.0b1\www\aviatec\smtp.php on line 183

et voici mon code :
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<?
class smtp_class {
  var $host_name="";
  var $host_port=25;
  var $localhost="";
  var $timeout=0;
  var $error="";
  var $debug=0;
  var $esmtp=1;
  var $esmtp_host="";
  var $esmtp_extensions=array();
  var $maximum_piped_recipients=100;    
  var $state="Disconnected";
  var $connection=0;
  var $pending_recipients=0;
 
  Function OutputDebug($message) {
    echo $message,"\n";
  }
 
  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)=="\r\n") {
	$line=substr($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\r\n")) {
      $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->state,"Connected")) {
      $this->error="connection is not in the initial state";
      return(0);
    }
    $this->error="";
    if(!$this->PutLine("MAIL FROM:<$sender>")) {
      return(0);
    }
    if(!IsSet($this->esmtp_extensions["PIPELINING"]) && $this->VerifyResultLines("250")<=0) {
      return(0);
    }
    $this->state="SenderSet";
    if(IsSet($this->esmtp_extensions["PIPELINING"])) {
      $this->pending_sender=1;
    }
    $this->pending_recipients=0;
    return(1);
  }
 
  Function SetRecipient($recipient) {
    switch($this->state) {
      case "SenderSet" :
 
      case "RecipientSet" : break; 
 
      default : $this->error="connection is not in the recipient setting state";
      return(0);
 
    }
    $this->error="";
    if(!$this->PutLine("RCPT TO:<$recipient>")) {
      return(0);
    }
    if(IsSet($this->esmtp_extensions["PIPELINING"])) {
      $this->pending_recipients++;
      if($this->pending_recipients>=$this->maximum_piped_recipients) {
	if(!$this->FlushRecipients())
	  return(0);
      }
    } else {
      if($this->VerifyResultLines(array("250","251"))<=0) {
	return(0);
      }
    }
    $this->state="RecipientSet";
    return(1);
  }
 
  Function StartData() {
    if(strcmp($this->state,"RecipientSet")) {
      $this->error="connection is not in the start sending data state";
      return(0);
    }
    $this->error="";
    if(!$this->PutLine("DATA")) {
      return(0);
    }
    if($this->pending_recipients) {
      if(!$this->FlushRecipients()) {
	return(0);
      }
    }
    if($this->VerifyResultLines("354")<=0) {
      return(0);
    }
    $this->state="SendingData";
    return(1);
  }
 
  Function PrepareData($data,&$output) {
    $length=strlen($data);
    for($output="",$position=0;$position<$length;) {
      $next_position=$length;
      for($current=$position;$current<$length;$current++) {
	switch($data[$current]) {
			case "\n" : $next_position=$current+1;
			break 2;
 
			case "\r" : $next_position=$current+1;
			if($data[$next_position]=="\n") {
			  $next_position++;
			}
			break 2;
		      }
      }
      if($data[$position]==".") {
	$output.=".";
      }
      $output.=substr($data,$position,$current-$position)."\r\n";
      $position=$next_position;
    }
  }
 
 
  Function SendData($data) {
    if(strcmp($this->state,"SendingData")) {
      $this->error="connection is not in the sending data state";
      return(0);
    }
    $this->error="";
    return($this->PutData($data));
  }
 
  Function EndSendingData() {
    if(strcmp($this->state,"SendingData")) {
      $this->error="connection is not in the sending data state";
      return(0);
    }
    $this->error="";
    if(!$this->PutLine("\r\n.") || $this->VerifyResultLines("250")<=0) {
      return(0);
    }
    $this->state="Connected";
    return(1);
  }
 
  Function ResetConnection() {
    switch($this->state) {
		case "Connected" : return(1);
 
		case "SendingData" : $this->error="can not reset the connection while sending data";
		return(0);
 
		case "Disconnected" : $this->error="can not reset the connection before it is established";
		return(0);
	      }
    $this->error="";
    if(!$this->PutLine("RSET") || $this->VerifyResultLines("250")<=0) {
      return(0);
    }
    $this->state="Connected";
    return(1);
  }
 
  Function Disconnect($quit=1) {
    if(!strcmp($this->state,"Disconnected")) {
      $this->error="it was not previously established a SMTP connection";
      return(0);
    }
    $this->error="";
    if(!strcmp($this->state,"Connected") && $quit && (!$this->PutLine("QUIT") || $this->VerifyResultLines("221")<=0)) {
      return(0);
    }
    fclose($this->connection);
    $this->connection=0;
    $this->state="Disconnected";
    return(1);
  }
 
  Function SendMessage($sender,$recipients,$headers,$body) {
    if(($success=$this->Connect())) {
      if(($success=$this->MailFrom($sender))) {
	for($recipient=0;$recipient<count($recipients);$recipient++) {
	  if(!($success=$this->SetRecipient($recipients[$recipient]))) {
	    break;
	  }
	}
	if($success && ($success=$this->StartData())) {
	  for($header_data="",$header=0;$header<count($headers);$header++) {
	    $header_data.=$headers[$header]."\r\n";
	  }
	  if(($success=$this->SendData($header_data."\r\n"))) {
	    $this->PrepareData($body,$body_data);
	    $success=$this->SendData($body_data);
	  }
	  if($success) {
	    $success=$this->EndSendingData();
	  }
	}
      }
      $error=$this->error;
      $disconnect_success=$this->Disconnect($success);
      if($success) {
	$success=$disconnect_success;
      } else {
	$this->error=$error;
      }
    }
    return($success);
  }
 
};
 
?>
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Code : Sélectionner tout - Visualiser dans une fenêtre à part
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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;
	  }
Je n'arrive pas à voir le problème merci beaucoup