Question

我一直在使用以下内容来获取和通过电子邮件发送数据库中的人员。现在的问题是，数据库有超过500个成员，脚本速度变慢，并在TO：字段中显示每个成员的电子邮件地址。我尝试在另一个网站上建议使用BCC，但我想知道是不是有办法改变这个以单独发送电子邮件？

$sql = "SELECT * FROM users WHERE system = '101' AND mailing_list = 'yes'";
$result = mysql_query($sql) or die("Unable to execute<br />$sql<br />".mysql_error());
$row = mysql_fetch_array($result);
var_dump($row);
$to .= $row['email'] . "\r\n";
//send email

Answer 1

php的mail（）非常低效，我建议使用像phpmailer

这样的东西

来自手册：

注意：

值得注意的是mail（）函数不适合更大的   循环中的电子邮件量。此功能可打开和关闭SMTP   每个电子邮件的套接字，效率不高。

要发送大量电子邮件，请参阅»PEAR :: Mail和»   PEAR :: Mail_Queue包。

Answer 2

您需要使用PHPMailer，因为它仅用于此情况。 mail（）的问题在于它会在每封电子邮件后打开和关闭连接。您显然想要打开1个连接，发送所有电子邮件（逐个）并关闭连接。

像below：

require("class.phpmailer.php");

$mail = new phpmailer();

$mail->From     = "list@example.com";
$mail->FromName = "List manager";
$mail->Host     = "smtp1.example.com;smtp2.example.com";
$mail->Mailer   = "smtp";

@MYSQL_CONNECT("localhost","root","password");
@mysql_select_db("my_company");
$query  = "SELECT full_name, email, photo FROM employee WHERE id=$id";
$result = @MYSQL_QUERY($query);

while ($row = mysql_fetch_array ($result))
{
    // HTML body
    $body  = "Hello <font size=\"4\">" . $row["full_name"] . "</font>, <p>";
    $body .= "<i>Your</i> personal photograph to this message.<p>";
    $body .= "Sincerely, <br>";
    $body .= "phpmailer List manager";

    // Plain text body (for mail clients that cannot read HTML)
    $text_body  = "Hello " . $row["full_name"] . ", \n\n";
    $text_body .= "Your personal photograph to this message.\n\n";
    $text_body .= "Sincerely, \n";
    $text_body .= "phpmailer List manager";

    $mail->Body    = $body;
    $mail->AltBody = $text_body;
    $mail->AddAddress($row["email"], $row["full_name"]);
    $mail->AddStringAttachment($row["photo"], "YourPhoto.jpg");

    if(!$mail->Send())
        echo "There has been a mail error sending to " . $row["email"] . "<br>";

    // Clear all addresses and attachments for next loop
    $mail->ClearAddresses();
    $mail->ClearAttachments();
}

来自sql实践的电子邮件列表

2 个答案: