Classe que valida email usando o DIG para conferir se o domínio digitado existe na internet dentre outras conferências.

Funciona somente em servidores *unix que tenha o DIG corretamente instalado.

Na maioria das versões Linux o dig ja vem instalado.

Contribuições e melhorias no código serão
bem vindas.

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Esconder código-fonte

<? // validatemail.php

/* 
--------------------------------------------------------------------------
VALIDAÇÃO DE EMAIL USANDO O DIG

AUTOR: JOÃO PAULO DE OLIVEIRA FARIA
ICQ: 13041300
MSN: [email protected]
EMAIL: [email protected]
VERSÃO: 0.1.0
--------------------------------------------------------------------------
*/

class validatemail
{

   var $config = array(

      "stop_error"       => 2,
      "show_message"      => 1,
      "enable_dig"      => 1

    );


   var $get = array(

      "field"       => 1,
      "value"       => 1,
      "message"       => 1,
      "status"       => 1

    );

   var $inf = array(

      "dominio"      => 1,
      "email"       => 1,
      "usuario"       => 1

    );

   function setConfig($config){

       foreach ($config as $key => $value) {
         if ($this->config[$key]){
               $this->config[$key] = "$config[$key]";
         }
      }

    }

   function setGet($get){

      foreach ($get as $key => $value) {
         if ($this->get[$key]){
               $this->get[$key] = "$get[$key]";
         }
      }

    }

    function setInf($inf){

      foreach ($inf as $key => $value) {
         if ($this->inf[$key]){
               $this->inf[$key] = "$inf[$key]";
         }
      }

    }


   function stringLow($text){

         $arrayLower=array('ç'
         ,'â','ã','à','á','ä'
         ,'é','è','ê','ë'
         ,'í','ì','î','ï'
         ,'ó','ò','ô','õ','ö'
         ,'ú','ù','û','ü');

         $arrayUpper=array('Ç'
         ,'Â','Ã','Á','À','Ä'
         ,'É','È','Ê','Ë'
         ,'Í','Ì','Î','Ï'
         ,'Ó','Ò','Õ','Ô','Ö'
         ,'Ú','Ù','Û','Ü');

         $arrayFinal=array('c'
         ,'a','a','a','a','a'
         ,'e','e','e','e'
         ,'i','i','i','i'
         ,'o','o','o','o'
         ,'u','u','u','u');


      $text=strtolower($text);
      $text=str_replace($arrayLower, $arrayFinal, $text);
      $text=str_replace($arrayUpper, $arrayFinal, $text);

         return $text;
   }



   function showMessage(){


      if ($this->config['show_message']=="1"){

         $get = $this->get['status'];

         if ($get=="1"){

            $msg = "OK    ->";
         }else{

            $msg = "ERROR ->";

         }
         
         $message = $this->get['message'];
         $value = $this->get['value'];
         $field = $this->get['field'];
         
         echo $msg." ".$message.' / Field:['.$field.'] Value:['.$value.']'."\n";

      }

   }

   function stop(){

      if ($this->config['stop_error']=="1"){

         exit();

      }

   }

   
   function chkLogin($login){




      if (strlen($login)>32){

         $get = array(

            "field"    => "usuario",
            "value"    => "$login",
            "message"    => "MAX LENGHT OF LOGIN IS 32",
                "status"     => "2"

          );

         $this->setGet($get);
         $this->showMessage();
         $this->stop();

         return FALSE;

      }else if (is_numeric(substr($login, 0, 1))){

         $get = array(

            "field"    => "usuario",
            "value"    => "$login",
            "message"    => "THE FIRST CHAR IS NUMBER",
                "status"     => "2"

          );

         $this->setGet($get);
         $this->showMessage();
         $this->stop();

         return FALSE;

      }else{

         $arrayIni=array(
            '"','\'','','\\','!','#',
            '$','%','¨','&','*',
            '(',')','=','+','{','}',
            '`','´','~','^',']','[',
            ',',':',';','/','?','|',' ','ñ',
         'ç','â','ã','à','á','ä'
            ,'é','è','ê','ë'
            ,'í','ì','î','ï'
            ,'ó','ò','ô','õ','ö'
            ,'ú','ù','û','ü','Ç'
            ,'Â','Ã','Á','À','Ä'
            ,'É','È','Ê','Ë'
            ,'Í','Ì','Î','Ï'
            ,'Ó','Ò','Õ','Ô','Ö'
            ,'Ú','Ù','Û','Ü'
            );


            $arrayFinal=array();


         $text=str_replace($arrayIni, $arrayFinal, $login);


         if($text!=$login){


            $get = array(

               "field"    => "usuario",
               "value"    => "$login",
               "message"    => "ILEGAL CHARS",
                   "status"     => "2"

             );

            $this->setGet($get);
            $this->showMessage();
            $this->stop();

            return FALSE;

         }else{

            return TRUE;

         }

      }




   }
   
   
   function chkDig($domain){

   
      
      $return = shell_exec("dig ".$domain." +trace");
      $lines = explode("\n",$return);

      $cont = 0;

      foreach ($lines as $line_num => $line) {

         if (ereg('Received',$line)){

            $cont++;
            

         }

      }



      if ( $cont <= "3" ){

         $get = array(

            "field"    => "dominio",
            "value"    => "$domain",
            "message"    => "DIG WARNING: INVALID DOMAIN",
                "status"     => "2"

          );

         $this->setGet($get);
         $this->showMessage();
         $this->stop();

         return FALSE;
         
         echo "aqui";

      }else{
      
         $inf = array(

            "dominio"   => "$domain"

          );

         $this->setInf($inf);

         return TRUE;
      
      
      }

   }


   function chkDomain($domain){

      $inf = array(

         "dominio"   => "$domain"

      );

      $this->setInf($inf);

      $domainlower = strtolower($domain);

      $arrayIni=array(
      '"','\'','','\\','!','#',
      '$','%','¨','&','*',
      '(',')','=','+','{','}',
      '`','´','~','^',']','[',
      ',',':',';','/','?','|','@',

      'ñ',
         'ç','â','ã','à','á','ä'
            ,'é','è','ê','ë'
            ,'í','ì','î','ï'
            ,'ó','ò','ô','õ','ö'
            ,'ú','ù','û','ü','Ç'
            ,'Â','Ã','Á','À','Ä'
            ,'É','È','Ê','Ë'
            ,'Í','Ì','Î','Ï'
            ,'Ó','Ò','Õ','Ô','Ö'
            ,'Ú','Ù','Û','Ü'
          );


         $arrayFinal=array();


      $newdomain=str_replace($arrayIni, $arrayFinal, $domain);

                if($domain!=$newdomain){

                   $get = array(

            "field"    => "dominio",
            "value"    => "$domain",
            "message"    => "ILEGAL CHAR DOMAIN",
                "status"     => "2"

          );

         $this->setGet($get);
         $this->showMessage();
         $this->stop();

         return FALSE;


                }elseif (!is_string(substr($domainlower, 0, 1))){

                   $get = array(

            "field"    => "dominio",
            "value"    => "$domain",
            "message"    => "ILEGAL CHAR IN FIRST CHAR DOMAIN",
                "status"     => "2"

          );

         $this->setGet($get);
         $this->showMessage();
         $this->stop();

         return FALSE;

      }elseif($this->config['enable_dig']==1 and $this->chkDig($domainlower)){

            return TRUE;

         }else{

            $get = array(

               "field"    => "email",
               "value"    => "$domain",
               "message"    => "INVALID DOMAIN",
                   "status"     => "2"

             );

            $this->setGet($get);
            $this->showMessage();
            $this->stop();

            return FALSE;

         }

      


   }


   function chkEmail($email){

      
   
      if (!empty($email)){
      
         $field_email = explode('@',$email);


         $email = $this->stringLow($email);
         $usuario = $this->stringLow($field_email[0]);
         $domain = $this->stringLow($field_email[1]);


                   $inf = array(

            "email"    => "$email",
            "usuario"   => "$usuario"

         );

         $this->setInf($inf);


         if ((!empty($field_email['0']) and $this->chkLogin($field_email['0'])) and (!empty($field_email['1']) and $this->chkDomain($field_email['1']))){

      
            $get = array(

                  "field"    => "email",
                  "value"    => "$email",
                  "message"    => "VALIDATE SUCESSED!!!",
                  "status"    => "1"
   
                );
   
            $this->get['status'] = "1";
   
            $this->setGet($get);
            $this->showMessage();


            return TRUE;

         }else{

            return FALSE;
            
         }

      }else{
      
         $get = array(

            "field"    => "email",
            "message"    => "EMPTY REQUIRE FIELD",
                "value"     => " ",
            "status"    => "2",


          );

         $this->setGet($get);
         $this->showMessage();
         $this->stop();


                   return FALSE;
      
      }


   }

   
}

$validatemail = new validatemail;

?>

<?  // programa.php

require_once("validatemail.php");
 
 
 /* CONFIGURAÇÃO */
 
 
 $config = array(

       /* Para o script caso de erro 1=Sim 2=Nao */
      "stop_error"       => 2, 
      /* Mostra mensagens 1=Sim 2=Nao */
      "show_message"      => 2,
      /* Usa o programa DIG para validar 1=Sim 2=Nao */
      "enable_dig"      => 1

    );
 
 $validatemail->setConfig($config);
 

 /* EXEC */
 
 $email = "[email protected]";
 
 

 
 
 /* RETORNA INFORMACOES VALIDADAS e FORMATADAS*/
 
 
 
 
 
 if($validatemail->chkEmail($email)){
 
    $email =  $validatemail->inf['email'];
    $dominio =  $validatemail->inf['dominio'];
    $usuario =  $validatemail->inf['usuario'];
   $mensagem =  $validatemail->get['message'];
   
 
   echo "OK---------- $mensagem<br>";
    echo "DOMINIO: $dominio<br>";
    echo "USUARIO: $usuario<br>";
    echo "EMAIL: $email<br>";
 
 }else{
 
    $email =  $validatemail->inf['email'];
    $dominio =  $validatemail->inf['dominio'];
    $usuario =  $validatemail->inf['usuario'];
   $mensagem =  $validatemail->get['message'];
 
   echo "ERROR---------- $mensagem<br>"
    echo "DOMINIO: $dominio<br>";
    echo "USUARIO: $usuario<br>";
    echo "EMAIL: $email<br>";
 
    echo "<pre>";
    print_r($validatemail->get);
   echo "</pre>";
    
   
 }
 
 
 
 ?>

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