e107_handlers/mail_validation_class.php
<?php
if (!defined('e107_INIT')) { exit; }
/* Manuel Lemos's PHP E-mail validation class
* http://freshmeat.net/projects/emailaddressvalidationcomponent/
* email_validation.php
*
* @(#) $Header: /cvs_backup/e107_0.8/e107_handlers/mail_validation_class.php,v 1.1.1.1 2006-12-02 04:33:46 mcfly_e107 Exp $
*
*/
/**
*
*/
class email_validation_class
{
var $email_regular_expression="^([-!#\$%&'*+./0-9=?A-Z^_`a-z{|}~])+@([-!#\$%&'*+/0-9=?A-Z^_`a-z{|}~]+\\.)+[a-zA-Z]{2,6}\$";
var $timeout=0;
var $data_timeout=0;
var $localhost="";
var $localuser="";
var $debug=0;
var $html_debug=0;
var $exclude_address="";
var $getmxrr="GetMXRR";
var $next_token="";
var $preg;
var $last_code="";
/**
* @param $string
* @param $separator
* @return mixed|string
*/
Function Tokenize($string, $separator="")
{
if(!strcmp($separator,""))
{
$separator=$string;
$string=$this->next_token;
}
for($character=0, $characterMax = strlen($separator); $character< $characterMax; $character++)
{
if(GetType($position=strpos($string,$separator[$character]))=="integer")
$found=(IsSet($found) ? min($found,$position) : $position);
}
if(IsSet($found))
{
$this->next_token=substr($string,$found+1);
return(substr($string,0,$found));
}
else
{
$this->next_token="";
return($string);
}
}
/**
* @param $message
* @return void
*/
Function OutputDebug($message)
{
$message.="\n";
if($this->html_debug)
$message=str_replace("\n","<br />\n",HtmlEntities($message));
echo $message;
flush();
}
/**
* @param $connection
* @return int|string
*/
Function GetLine($connection)
{
for($line="";;)
{
if(feof($connection))
return(0);
$line.=fgets($connection,100);
$length=strlen($line);
if($length>=2
&& substr($line,$length-2,2)=="\r\n")
{
$line=substr($line,0,$length-2);
if($this->debug)
$this->OutputDebug("S $line");
return($line);
}
}
}
/**
* @param $connection
* @param $line
* @return false|int
*/
Function PutLine($connection, $line)
{
if($this->debug)
$this->OutputDebug("C $line");
return(fwrite($connection,"$line\r\n"));
}
/**
* @param $email
* @return false|int
*/
Function ValidateEmailAddress($email)
{
if(IsSet($this->preg))
{
if(strlen($this->preg))
return(preg_match($this->preg,$email));
}
else
{
$this->preg=(function_exists("preg_match") ? "/".str_replace("/", "\\/", $this->email_regular_expression)."/" : "");
return($this->ValidateEmailAddress($email));
}
return(preg_match("/".str_replace("/", "\\/", $this->email_regular_expression)."/i", $email)/*!=0*/);
}
/**
* @param $email
* @param $hosts
* @return bool|int
*/
Function ValidateEmailHost($email, &$hosts)
{
if(!$this->ValidateEmailAddress($email))
return(0);
$user=$this->Tokenize($email,"@");
$domain=$this->Tokenize("");
$hosts=$weights=array();
$getmxrr=$this->getmxrr;
if(function_exists($getmxrr)
&& $getmxrr($domain,$hosts,$weights))
{
$mxhosts=array();
for($host=0, $hostMax = count($hosts); $host< $hostMax; $host++)
$mxhosts[$weights[$host]]=$hosts[$host];
KSort($mxhosts);
for(Reset($mxhosts), $host=0, $hostMax = count($mxhosts); $host< $hostMax; Next($mxhosts), $host++)
$hosts[$host]=$mxhosts[Key($mxhosts)];
}
else
{
if(strcmp($ip=@gethostbyname($domain),$domain)
&& (strlen($this->exclude_address)==0
|| strcmp(@gethostbyname($this->exclude_address),$ip)))
$hosts[]=$domain;
}
return(count($hosts)!=0);
}
/**
* @param $connection
* @param $code
* @return int
*/
Function VerifyResultLines($connection, $code)
{
while(($line=$this->GetLine($connection)))
{
$this->last_code=$this->Tokenize($line," -");
if(strcmp($this->last_code,$code))
return(0);
if(!strcmp(substr($line, strlen($this->last_code), 1)," "))
return(1);
}
return(-1);
}
/**
* @param $email
* @return bool|int
*/
Function ValidateEmailBox($email)
{
if(!$this->ValidateEmailHost($email,$hosts))
return(0);
if(!strcmp($localhost=$this->localhost,"")
&& !strcmp($localhost=getenv("SERVER_NAME"),"")
&& !strcmp($localhost=getenv("HOST"),""))
$localhost="localhost";
if(!strcmp($localuser=$this->localuser,"")
&& !strcmp($localuser=getenv("USERNAME"),"")
&& !strcmp($localuser=getenv("USER"),""))
$localuser="root";
for($host=0, $hostMax = count($hosts); $host< $hostMax; $host++)
{
$domain=$hosts[$host];
if(preg_match('/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/',$domain))
$ip=$domain;
else
{
if($this->debug)
$this->OutputDebug("Resolving host name \"".$hosts[$host]."\"...");
if(!strcmp($ip=@gethostbyname($domain),$domain))
{
if($this->debug)
$this->OutputDebug("Could not resolve host name \"".$hosts[$host]."\".");
continue;
}
}
if(strlen($this->exclude_address)
&& !strcmp(@gethostbyname($this->exclude_address),$ip))
{
if($this->debug)
$this->OutputDebug("Host address of \"".$hosts[$host]."\" is the exclude address");
continue;
}
if($this->debug)
$this->OutputDebug("Connecting to host address \"".$ip."\"...");
if(($connection=($this->timeout ? @fsockopen($ip,25,$errno,$error,$this->timeout) : @fsockopen($ip,25))))
{
$timeout=($this->data_timeout ? $this->data_timeout : $this->timeout);
if($timeout
&& function_exists("socket_set_timeout"))
stream_set_timeout($connection,$timeout,0);
if($this->debug)
$this->OutputDebug("Connected.");
if($this->VerifyResultLines($connection,"220")>0
&& $this->PutLine($connection,"HELO $localhost")
&& $this->VerifyResultLines($connection,"250")>0
&& $this->PutLine($connection,"MAIL FROM: <$localuser@$localhost>")
&& $this->VerifyResultLines($connection,"250")>0
&& $this->PutLine($connection,"RCPT TO: <$email>")
&& ($result=$this->VerifyResultLines($connection,"250"))>=0)
{
if($result)
{
if($this->PutLine($connection,"DATA"))
$result=($this->VerifyResultLines($connection,"354")!=0);
}
else
{
if(strlen($this->last_code)
&& !strcmp($this->last_code[0],"4"))
$result=-1;
}
if($this->debug)
$this->OutputDebug("This host states that the address is ".($result ? ($result>0 ? "valid" : "undetermined") : "not valid").".");
$this->PutLine($connection,"QUIT");
fclose($connection);
if($this->debug)
$this->OutputDebug("Disconnected.");
return($result);
}
if($this->debug)
$this->OutputDebug("Unable to validate the address with this host.");
fclose($connection);
if($this->debug)
$this->OutputDebug("Disconnected.");
}
else
{
if($this->debug)
$this->OutputDebug("Failed.");
}
}
return(-1);
}
};