直接上程式碼：

<?php
$array_values['host'] = "host";
$array_values['port'] = 110;
$array_values['user'] = '使用者名稱';
$array_values['password'] = '密碼';
$array_values['checkmail'] = '[email protected]';

ganji_get_test_mail($array_values);

function ganji_get_test_mail($array_values)
{
  $host = $array_values['host'];
  $port = $array_values['port'];
  $user = $array_values['user'];
  $password = $array_values['password'];
  $checkmail = $array_values['checkmail'];
  $msg = '';
  $return_msg = '';
  // ini_set('memory_limit','80M');
  if (! ($sock = fsockopen(gethostbyname($host),$port,$errno,$errstr))) {
    exit($errno . ': ' . $errstr);
  }

  set_socket_blocking($sock,true);

  $command = "USER " . $user . "\r\n";
  fwrite($sock,$command);
  $msg = fgets($sock);
  $command = "PASS " . $password . "\r\n";
  fwrite($sock,$command);
  $msg = fgets($sock);

  $command = "stat\r\n";
  fwrite($sock,$command);
  $return_msg = fgets($sock);

  $msg = fgets($sock);

  $command = "LIST\r\n";
  fwrite($sock,$command);
  $all_mails = array();
  while (true) {
    $msg = fgets($sock);
    if (! preg_match('/^\+OK/',$msg) && ! preg_match('/^\./',$msg)) {
      $msg = preg_replace('/\ .*\r\n/','',$msg);
      array_push($all_mails,$msg);
    }
    if (preg_match('/^\./',$msg))
      break;
  }

  // 獲取郵件列表
  $ganji_mails = array();
  foreach ($all_mails as $item) {
    fwrite($sock,"TOP $item 0\r\n");
    while (true) {
      $msg = fgets($sock);
      // echo $msg . "<Br><Br>";
      if (preg_match('/^\./',$msg)) {
        array_push($ganji_mails,$item);
        break;
      }
    }
    continue;
  }

  $mail_content = '';
  $array_ganji_mails = array();

  //逐行遍歷
  foreach ($ganji_mails as $item) {
    fwrite($sock,"RETR $item\r\n");
    while (true) {
      $msg = fgets($sock);
      $mail_content .= $msg;
      if (preg_match('/^\./',$msg)) {
        array_push($array_ganji_mails,iconv_mime_decode_headers($mail_content,"UTF-8"));
        $mail_content = '';
        break;
      }
    }
  }

  // 直接獲取第一封郵件全部資訊 9999長度
  fwrite($sock,"RETR 1\r\n");
  $mail_contents = fread($sock,9999); // 直接獲取全部

  echo "<br>";
  var_dump($mail_contents);
  echo "<br>";

  $command = "QUIT\r\n";
  fwrite($sock,$command);
  $msg = fgets($sock);

  return $mail_contents;
}

常用的POP3命令介紹　：

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