[英]Phpmailer and async sending email
I read some other question before ask here cause other answers don't response to my problem.我在这里问之前阅读了一些其他问题,因为其他答案没有回应我的问题。
I've a custom made cms in php.我在 php 中有一个定制的 cms。 For example if I insert a new payment, the script send to all admin user a notify:
例如,如果我插入新付款,脚本会向所有管理员用户发送通知:
function insert_payment() {
// CODE TO INSERT PAYMENT INSIDE MYSQL DB
$sql_payment = "INSERT INTO payments ($amount, ...) VALUES (?, ...);"
...
// NOTIFY ALL ADMINS
foreach ( $array_emails as $email ) {
send_email_to_admin($email, $subject, $body);
}
// redirect to dashboard
header("Location: " . $homepage);
} }
This is an example of send_email_to_admin()
function:这是
send_email_to_admin()
函数的示例:
function send_email_to_admin($email, $subject, $body) {
// return example:
// $result = array(
// "Error" = true or false
// "DateTimeOfSent" = datetime
// "Email" = string
//)
// SAVE RESULTS IN MYSQL DB ( I need to register results to be sure email are sent without errors...table can be then seen to a specific pages under admin panel of cms)
$mail = new PHPMailer;
...
...
if(!$mail->send()) {
$result = array("Error" => true, "DateTimeOfSent" => date("Y-m-d"), "Email" => $mail);
} else {
$result = array("Error" => false, "DateTimeOfSent" => date("Y-m-d"), "Email" => $mail);
}
$sql_result = "INSERT INTO SentResult ("Error", "DateTimeSent", "Email", ...) VALUES ( $result['Error'], $result['DateTimeOfSent'], $result['Email'] )"
...
//end function
}
Now if I have 1 or 2 admins is ok...but if I have a lot of admins the time gap is not good for waiting a result for each sent.现在,如果我有 1 或 2 个管理员也可以……但是如果我有很多管理员,那么等待每个发送的结果的时间间隔并不好。
I'd like to pass the foreach loop to a child process if it possible that can process async the entire loop of SENDING and SAVING inside MYSQL the results.如果可能的话,我想将 foreach 循环传递给子进程,如果它可以在 MYSQL 结果中异步处理整个 SENDING 和 SAVING 循环。
So header("Location: " . $homepage)
can be executed immediately.所以
header("Location: " . $homepage)
可以立即执行。
Some additional info:一些额外的信息:
I'm using hosted server so i can't install packages and libraries我正在使用托管服务器,所以我无法安装包和库
I can use only function provided by default PHP config我只能使用默认 PHP 配置提供的功能
I can't use a cronjob queue method cause my hosting not provide a free service我无法使用 cronjob 队列方法,因为我的主机不提供免费服务
i'd like a solution working on IIS windows server and a Linux based server我想要一个适用于 IIS Windows 服务器和基于 Linux 的服务器的解决方案
I'd like an little script example based on my code cause i never used a async method in php and i don't know nothing about it :(我想要一个基于我的代码的小脚本示例,因为我从未在 php 中使用过异步方法,我对此一无所知:(
Sorry for my english对不起我的英语不好
you could implement a queue and process this queue (asynchronously) with a curl call.您可以实现一个队列并使用 curl 调用(异步)处理该队列。
Instead of sending the emails directly from function send_email_to_admin()
, insert a new dataset in a dedicated SQL table EmailQueue
.不是直接从函数
send_email_to_admin()
发送电子邮件,而是在专用 SQL 表EmailQueue
插入一个新数据集。 Next you write a recursive function that processes this queue (all emails waiting to be send) until the table EmailQueue
is empty.接下来编写一个递归函数来处理这个队列(所有等待发送的电子邮件),直到表
EmailQueue
为空。
insert payment:插入付款:
...
// NOTIFY ALL ADMINS
foreach ( $array_emails as $email ) {
queue_email($email, $subject, $body);
}
curl_process_email_queue();
...
make CURL call, to detach from parent script ( source ):进行 CURL 调用,从父脚本( 源)分离:
function curl_process_email_queue() {
$c = curl_init();
curl_setopt($c, CURLOPT_URL, $url/send_queued_emails.php);
curl_setopt($c, CURLOPT_FOLLOWLOCATION, true); // Follow the redirects (needed for mod_rewrite)
curl_setopt($c, CURLOPT_HEADER, false); // Don't retrieve headers
curl_setopt($c, CURLOPT_NOBODY, true); // Don't retrieve the body
curl_setopt($c, CURLOPT_RETURNTRANSFER, true); // Return from curl_exec rather than echoing
curl_setopt($c, CURLOPT_FRESH_CONNECT, true); // Always ensure the connection is fresh
// Timeout super fast once connected, so it goes into async.
curl_setopt( $c, CURLOPT_TIMEOUT, 1 );
return curl_exec( $c );
}
queue email:队列电子邮件:
function queue_email($email, $subject, $body) {
$sql = "INSERT INTO emailQueue ("email", "subject", "body") VALUES ($email, $subject, $body)";
...
};
seperate PHP send_queued_emails.php
script to be called via URL by cURL, that actualy sends the queued emails (recursively, until queue is empty):单独的 PHP
send_queued_emails.php
脚本由 cURL 通过 URL 调用,实际上发送排队的电子邮件(递归,直到队列为空):
<?php
// close connection early, but keep executing script
// https://stackoverflow.com/a/141026/5157195
ob_end_clean();
header("Connection: close");
ignore_user_abort(true);
ob_start();
echo('Some status message');
$size = ob_get_length();
header("Content-Length: $size");
header("Content-Encoding: none");
ob_end_flush();
flush();
// connection is closed at this point
// start actual processing here
send_queued_emails();
function send_queued_emails() {
// avoid concurrent access
$sql = 'START TRANSACTION';
mysqli_query($sql);
// read one item from the queue
$sql = 'SELECT "id", email", "subject", "body" FROM emailQueue LIMIT 1';
$result = mysqli_query($sql);
// if no more datasets are found, exit the function
if (!$result || (mysqli_num_rows($result) == 0))
return;
// mail the queried data
$mail = new PHPMailer;
...
// optionally write the result back to database
$sql_result = 'INSERT INTO SentResult ... ';
mysqli_query($sql);
// delete the email from the queue
$sql = 'DELETE FROM emailQueue WHERE "id"=...';
mysqli_query($sql);
// commit transaction
$sql = 'COMMIT';
mysqli_query($sql);
// recursively call the function
send_queued_emails();
};
To improve the reliability you may want to use transactions , to prevent issues for concurrent calls of the script send_queued_emails.php
.为了提高可靠性,您可能需要使用事务,以防止脚本
send_queued_emails.php
并发调用出现问题。 For other options also see Methods for asynchronous processes in PHP 5.4 .对于其他选项,另请参阅PHP 5.4 中异步进程的方法。
EDIT: added "close connection early, but keep executing script" as proposed in this thread .编辑:添加了“提前关闭连接,但继续执行脚本”,如该线程中的建议。 This should enable you to even set a higher timeout for the cURL call.
这应该使您甚至可以为 cURL 调用设置更高的超时时间。
EDIT2: added header("Content-Encoding: none");
EDIT2:添加
header("Content-Encoding: none");
as proposed by itajackass (refer to comments)由 itajackass 提出(请参阅评论)
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