PHP 邮箱验证类 -- 正则匹配并域名验证

  1 <?php

  2  /**

  3   * function getmxrr

  4   * 获取指定域名的MX记录信息

  5  */

  6  function win_getmxrr($hostname, &$mxhosts, &$mxweight=false) 

  7  {

  8     if (strtoupper(substr(PHP_OS, 0, 3)) != 'WIN') return;

  9     if (!is_array ($mxhosts) ) $mxhosts = array();

 10     if (empty($hostname)) return;

 11     $exec='nslookup -type=MX '.escapeshellarg($hostname);

 12     @exec($exec, $output);

 13     if (empty($output)) return;

 14     $i=-1;

 15     foreach ($output as $line) {

 16         $i++;

 17         if (preg_match("/^$hostname\tMX preference = ([0-9]+), mail exchanger = (.+)$/i", $line, $parts)) {

 18           $mxweight[$i] = trim($parts[1]);

 19           $mxhosts[$i] = trim($parts[2]);

 20         }

 21         if (preg_match('/responsible mail addr = (.+)$/i', $line, $parts)) {

 22           $mxweight[$i] = $i;

 23           $mxhosts[$i] = trim($parts[1]);

 24         }

 25     }

 26     return ($i!=-1);

 27  }

 28  if (!function_exists('getmxrr')) {

 29     function getmxrr($hostname, &$mxhosts, &$mxweight=false) {

 30         return win_getmxrr($hostname, $mxhosts, $mxweight);

 31     }

 32  }

 33  

 34  /**

 35   * class EmailLinker

 36   * 邮箱验证类，正则匹配邮箱地址并对域名是否有MX解析进行验证

 37  */ 

 38  class EmailLinker

 39  {

 40      CONST CONN_TIMEOUT = 10;

 41      CONST READ_TIMEOUT = 5;

 42      CONST SMTP_PORT = 25;

 43      private $email;

 44      function __construct($email)

 45      {

 46          $this->email = $email;

 47          $this->redirectIfNeeded();

 48      }

 49      //重定向邮箱地址

 50      function redirectIfNeeded()

 51      {

 52          if(array_key_exists('mail',$_GET) && $this->email == base64_decode($_GET['mail']) ){

 53              header('Location: mailto:'.$this->email);

 54              exit;

 55          }    

 56      }

 57  

 58      //回调返回邮箱地址

 59      public function link()

 60      {

 61          if($this->isValid()){

 62              $encoded = base64_encode($this->email);

 63              return '<a href="?mail='.urlencode($encoded).'" target="_blank">Email:'.$this->email.'</a>';

 64          }

 65      }

 66      //获取邮箱地址并验证

 67      public function isValid($mail = '')

 68      {

 69              static $valid = null;

 70              if($mail){

 71                  return ( $this->getParts() != null );

 72              }

 73              if($valid !== null){

 74                  return $valid;

 75              }

 76              if($parts = $this->getParts()){

 77                  $valid = $this->validateUser($parts['host'],$parts['user']);

 78              }

 79              return $valid;

 80      }

 81      private function validateUser($hostname,$user)

 82      {

 83          if($sock = $this->openSMTPSocket($hostname)){

 84              $this->smtpSend($sock,"HELO $hostname");

 85              $resp  = $this->smtpSend($sock,"MALL FROM: <$user@$hostname>");

 86              //$resp  = $this->smtpSend($sock,"RCPT TO:<$user@$hostname>"); //这一步可能被ISP过滤了，导致邮箱验证不成功

 87              $vaild = (preg_match('/250|451|452\s/',$resp) == 1);

 88              fclose($sock);

 89              return $vaild;

 90          }else{

 91              return false;

 92          }

 93      }

 94      private function openSMTPSocket($hostname)

 95      {

 96          $hosts = $this->getMX($hostname);

 97          foreach($hosts as $host => $weight)

 98          {

 99              if($sock = @fsockopen($host,self::SMTP_PORT,$errno,$errstr,self::CONN_TIMEOUT))

100              {

101                  stream_set_timeout($sock,self::READ_TIMEOUT);

102                  return $sock;

103              }

104          }

105      }

106      private function getMX($hostname)

107      {

108          $host = array();

109          $weights = array();

110          getmxrr($hostname,$hosts,$weights);

111  

112          $results = array();

113          foreach($hosts as $i => $host)

114          {

115              $results[$host] = $weights[$i];

116          }

117          arsort($results,SORT_NUMERIC);

118          $results[$hostname] = 0;

119          return $results;

120      }

121      private function smtpSend($sock,$data)

122      {

123          fwrite($sock,"$data\r\n");

124          return fgets($sock,1024);

125      }

126      

127      //正则匹配

128      private function getParts()

129      {

130          //$emailRegex = '/\w+([-+.]\w+)*@\w+([-.]\w)*\.\w+([-.]\w+)*/x';

131          $emailRegex = <<<__REGEX__

132          /(?P<user>

133              \w+([-+.]\w+)*

134           )@(?P<host>

135               \w+([-.]\w)*\.\w+([-.]\w+)*

136           )/x

137  __REGEX__;

138          return (preg_match($emailRegex,$this->email,$matches))? $matches : null ;

139      }

140  

141  }

142  $emailLinker_class = new EmailLinker('[email protected]');

143  echo $emailLinker_class->link();

144  

145  

146  

147  ?>

 

源代码下载：EmailLinker_1228.zip