Source for file email_validation.php

Documentation is available at email_validation.php

  1. <?php
  2. /*
  3.  * email_validation.php
  4.  *
  5.  * @(#) $Header: /srv/cvs/framework/09-Implementacao/terceiros/email_validation.php,v 1.1 2007/01/15 12:56:58 mmerlone Exp $
  6.  *
  7.  */
  8.  
  9. class email_validation_class
  10. {
  11.     var $email_regular_expression="^([-!#\$%&'*+./0-9=?A-Z^_`a-z{|}~])+@([-!#\$%&'*+/0-9=?A-Z^_`a-z{|}~]+\\.)+[a-zA-Z]{2,6}\$";
  12.     var $timeout=0;
  13.     var $data_timeout=0;
  14.     var $localhost="";
  15.     var $localuser="";
  16.     var $debug=0;
  17.     var $html_debug=0;
  18.     var $exclude_address="";
  19.     var $getmxrr="GetMXRR";
  20.  
  21.     var $next_token="";
  22.     var $preg;
  23.     var $last_code="";
  24.  
  25.     Function Tokenize($string,$separator="")
  26.     {
  27.         if(!strcmp($separator,""))
  28.         {
  29.             $separator=$string;
  30.             $string=$this->next_token;
  31.         }
  32.         for($character=0;$character<strlen($separator);$character++)
  33.         {
  34.             if(GetType($position=strpos($string,$separator[$character]))=="integer")
  35.                 $found=(IsSet($found) ? min($found,$position) : $position);
  36.         }
  37.         if(IsSet($found))
  38.         {
  39.             $this->next_token=substr($string,$found+1);
  40.             return(substr($string,0,$found));
  41.         }
  42.         else
  43.         {
  44.             $this->next_token="";
  45.             return($string);
  46.         }
  47.     }
  48.  
  49.     Function OutputDebug($message)
  50.     {
  51.         $message.="\n";
  52.         if($this->html_debug)
  53.             $message=str_replace("\n","<br />\n",HtmlEntities($message));
  54.         echo $message;
  55.         flush();
  56.     }
  57.  
  58.     Function GetLine($connection)
  59.     {
  60.         for($line="";;)
  61.         {
  62.             if(feof($connection))
  63.                 return(0);
  64.             $line.=fgets($connection,100);
  65.             $length=strlen($line);
  66.             if($length>=2
  67.             && substr($line,$length-2,2)=="\r\n")
  68.             {
  69.                 $line=substr($line,0,$length-2);
  70.                 if($this->debug)
  71.                     $this->OutputDebug("S $line");
  72.                 return($line);
  73.             }
  74.         }
  75.     }
  76.  
  77.     Function PutLine($connection,$line)
  78.     {
  79.         if($this->debug)
  80.             $this->OutputDebug("C $line");
  81.         return(fputs($connection,"$line\r\n"));
  82.     }
  83.  
  84.     Function ValidateEmailAddress($email)
  85.     {
  86.         if(IsSet($this->preg))
  87.         {
  88.             if(strlen($this->preg))
  89.                 return(preg_match($this->preg,$email));
  90.         }
  91.         else
  92.         {
  93.             $this->preg=(function_exists("preg_match") ? "/".str_replace("/", "\\/", $this->email_regular_expression)."/" : "");
  94.             return($this->ValidateEmailAddress($email));
  95.         }
  96.         return(eregi($this->email_regular_expression,$email)!=0);
  97.     }
  98.  
  99.     Function ValidateEmailHost($email)
  100.     {
  101.         if(!$this->ValidateEmailAddress($email))
  102.             return(0);
  103.         $user=$this->Tokenize($email,"@");
  104.         $domain=$this->Tokenize("");
  105.         $hosts=$weights=array();
  106.         $getmxrr=$this->getmxrr;
  107.         if(function_exists($getmxrr)
  108.         && $getmxrr($domain,$hosts,$weights))
  109.         {
  110.             $mxhosts=array();
  111.             for($host=0;$host<count($hosts);$host++)
  112.                 $mxhosts[$weights[$host]]=$hosts[$host];
  113.             KSort($mxhosts);
  114.             for(Reset($mxhosts),$host=0;$host<count($mxhosts);Next($mxhosts),$host++)
  115.                 $hosts[$host]=$mxhosts[Key($mxhosts)];
  116.         }
  117.         else
  118.         {
  119.             if(strcmp($ip=@gethostbyname($domain),$domain)
  120.             && (strlen($this->exclude_address)==0
  121.             || strcmp(@gethostbyname($this->exclude_address),$ip)))
  122.                 $hosts[]=$domain;
  123.         }
  124.         return(count($hosts)!=0);
  125.     }
  126.  
  127.     Function VerifyResultLines($connection,$code)
  128.     {
  129.         while(($line=$this->GetLine($connection)))
  130.         {
  131.             $this->last_code=$this->Tokenize($line," -");
  132.             if(strcmp($this->last_code,$code))
  133.                 return(0);
  134.             if(!strcmp(substr($line, strlen($this->last_code), 1)," "))
  135.                 return(1);
  136.         }
  137.         return(-1);
  138.     }
  139.  
  140.     Function ValidateEmailBox($email)
  141.     {
  142.         if(!$this->ValidateEmailHost($email,$hosts))
  143.             return(0);
  144.         if(!strcmp($localhost=$this->localhost,"")
  145.         && !strcmp($localhost=getenv("SERVER_NAME"),"")
  146.         && !strcmp($localhost=getenv("HOST"),""))
  147.            $localhost="localhost";
  148.         if(!strcmp($localuser=$this->localuser,"")
  149.         && !strcmp($localuser=getenv("USERNAME"),"")
  150.         && !strcmp($localuser=getenv("USER"),""))
  151.            $localuser="root";
  152.         for($host=0;$host<count($hosts);$host++)
  153.         {
  154.             $domain=$hosts[$host];
  155.             if(ereg('^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$',$domain))
  156.                 $ip=$domain;
  157.             else
  158.             {
  159.                 if($this->debug)
  160.                     $this->OutputDebug("Resolving host name \"".$hosts[$host]."\"...");
  161.                 if(!strcmp($ip=@gethostbyname($domain),$domain))
  162.                 {
  163.                     if($this->debug)
  164.                         $this->OutputDebug("Could not resolve host name \"".$hosts[$host]."\".");
  165.                     continue;
  166.                 }
  167.             }
  168.             if(strlen($this->exclude_address)
  169.             && !strcmp(@gethostbyname($this->exclude_address),$ip))
  170.             {
  171.                 if($this->debug)
  172.                     $this->OutputDebug("Host address of \"".$hosts[$host]."\" is the exclude address");
  173.                 continue;
  174.             }
  175.             if($this->debug)
  176.                 $this->OutputDebug("Connecting to host address \"".$ip."\"...");
  177.             if(($connection=($this->timeout ? @fsockopen($ip,25,$errno,$error,$this->timeout) : @fsockopen($ip,25))))
  178.             {
  179.                 $timeout=($this->data_timeout ? $this->data_timeout : $this->timeout);
  180.                 if($timeout
  181.                 && function_exists("socket_set_timeout"))
  182.                     socket_set_timeout($connection,$timeout,0);
  183.                 if($this->debug)
  184.                     $this->OutputDebug("Connected.");
  185.                 if($this->VerifyResultLines($connection,"220")>0
  186.                 && $this->PutLine($connection,"HELO $localhost")
  187.                 && $this->VerifyResultLines($connection,"250")>0
  188.                 && $this->PutLine($connection,"MAIL FROM: <$localuser@$localhost>")
  189.                 && $this->VerifyResultLines($connection,"250")>0
  190.                 && $this->PutLine($connection,"RCPT TO: <$email>")
  191.                 && ($result=$this->VerifyResultLines($connection,"250"))>=0)
  192.                 {
  193.                     if($result)
  194.                     {
  195.                         if($this->PutLine($connection,"DATA"))
  196.                             $result=($this->VerifyResultLines($connection,"354")!=0);
  197.                     }
  198.                     else
  199.                     {
  200.                         if(strlen($this->last_code)
  201.                         && !strcmp($this->last_code[0],"4"))
  202.                             $result=-1;
  203.                     }
  204.                     if($this->debug)
  205.                         $this->OutputDebug("This host states that the address is ".($result ? ($result>0 ? "valid" : "undetermined") : "not valid").".");
  206.                     fclose($connection);
  207.                     if($this->debug)
  208.                         $this->OutputDebug("Disconnected.");
  209.                     return($result);
  210.                 }
  211.                 if($this->debug)
  212.                     $this->OutputDebug("Unable to validate the address with this host.");
  213.                 fclose($connection);
  214.                 if($this->debug)
  215.                     $this->OutputDebug("Disconnected.");
  216.             }
  217.             else
  218.             {
  219.                 if($this->debug)
  220.                     $this->OutputDebug("Failed.");
  221.             }
  222.         }
  223.         return(-1);
  224.     }
  225. };
  226.  
  227. ?>

Documentation generated on Sun, 09 Mar 2008 23:51:42 -0300 by phpDocumentor 1.4.0

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