php异步子用 提高用户体验
php异步调用 提高用户体验
这是我的一个技术很好的朋友写的,要我发表在我的博客上可让php爱好者的读者和爱好php学习的朋友们参考参考.
??????? 案例:PHP语言
某SNS社区,在系统里,用户给自己的好友(好友数量上百)发送邮件,每封邮件内容不一,发送后提示发送完毕!
常用PHP写法
sendmail.php
<?php $count=count($emailarr);//$emailarr数组为好友的邮件地址 for($i=0;$i<$count;$i++) { sendmail(.....);//发送邮件 } echo ''发送完毕'; ?>
?
假设该次发送100封邮件。本次操作会出现什么结果呢?
用户体验:用户等待->发送数十封邮件出去->系统超时返回错误信息
本次操作由于需要发送大量的邮件,导致php执行时间过长,用户烦躁的等待。当apache或者nginx等待超过允许执行时间,返回超时错误。这个时候用户不明确本次操作到底成功与否,到底发出了几封邮件。
我们可以看出该代码用户体验极差,并且不能够顺利完成任务。
那应该怎么操作呢?
这里提到一个概念,异步执行
用户体验:用户等待->发送完毕
朋友们就会问,怎么缺少发信环节?
OK,发信环节就在用户提交请求的时候,把发信任务转给了一个单独处理发信的php程序处理了,当用户看见“发送完毕”的时候其实信还没发送完,这个时候,发信程序正在后台努力的工作着,一封一封的向外发送
sendmail.php
<?php $domain="www.***.com"; $url="/system_mail.php"; $par="email=".implode(',',$emailarr)."&........"; $header = "POST $url HTTP/1.0\r\n"; $header .= "Content-Type: application/x-www-form-urlencoded\r\n"; $header .= "Content-Length: " . strlen($par) . "\r\n\r\n"; $fp = @fsockopen ($domain, 80, $errno, $errstr, 30); fputs ($fp, $header . $par); fclose($fp); echo ''发送完毕'; ?> system_mail.php <?php ini_set("ignore_user_abort",true); ignore_user_abort(true);//此处的代码需要php.ini开启相关的选项,保证php执行不超时的,不明白,参考我的另一篇文章 “关闭浏览器后,php脚本会不会继续运行” /* 获取email地址,发信,此处为发信代码 */ ?>
?好了,改成异步方式后,用户提交信息,可以立即得到结果“发送完毕”。信呢,会在后台一封一封的发送,直到发送完毕
本文来源于php爱好者 http://www.phplover.cn/ , 原文地址:http://www.phplover.cn/post/phpyibugongzuotishengyonghutiyan.html
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