WordPress中发送HTML邮件的方法
<p><strong style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>方法一，用filter发送HTML邮件 </strong><br><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>发邮件用的函数是wp_mail()，wp_mail()则基于强大的邮件类phpMailer，所以发送HTML格式是小菜一碟。只是WordPress默认以纯文本格式发送邮件，我们收到的重设密码、评论提醒、用户注册等邮件都是纯文本格式的。 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>要发送HTML格式，wp_mail()给我们提供了一个filter可以改变content-type，在主题的functions.php或插件中写如下代码即可 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>
</p>
<div style='margin: 3px auto 0px; padding: 0px 3px; outline: none; line-height: 21.6px; clear: both; border-width: 1px; border-style: solid; border-color: rgb(0, 153, 204); background: rgb(246, 251, 255); overflow: hidden; font-family: tahoma, arial, "Microsoft YaHei";'>
<p style="margin: 0px; padding: 0px; outline: none; float: right; line-height: 25.2px; font-size: 14px;">
<span style="line-height: 25.2px; cursor: pointer;"><u>复制代码</u></span></p>
<p>
代码如下:</p>
</div>
<p style='margin: 0px auto 3px; padding: 0px 3px; outline: none; line-height: 25.2px; font-size: 14px; clear: both; border-right: 1px solid rgb(0, 153, 204); background: rgb(221, 237, 251); overflow: hidden; border-left: 1px solid rgb(0, 153, 204); word-break: break-all; border-bottom: 1px solid rgb(0, 153, 204); word-wrap: break-word; font-family: tahoma, arial, "Microsoft YaHei";'>
<br>
add_filter('wp_mail_content_type',create_function('', 'return "text/html";')); </p>
<p>
<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>这样做会导致所有邮件都以html格式发送，那些本来用纯文本发送的邮件可能会变得惨不忍睹（例如重设密码、用户注册等邮件），所以可以只在满足某些条件时使用HTML格式发送，其它时候还是用默认的，这样代码变成下面这样 </span></p>
<div style='margin: 3px auto 0px; padding: 0px 3px; outline: none; line-height: 21.6px; clear: both; border-width: 1px; border-style: solid; border-color: rgb(0, 153, 204); background: rgb(246, 251, 255); overflow: hidden; font-family: tahoma, arial, "Microsoft YaHei";'>
<p style="margin: 0px; padding: 0px; outline: none; float: right; line-height: 25.2px; font-size: 14px;">
<span style="line-height: 25.2px; cursor: pointer;"><u>复制代码</u></span></p>
<p>
代码如下:</p>
</div>
<p style='margin: 0px auto 3px; padding: 0px 3px; outline: none; line-height: 25.2px; font-size: 14px; clear: both; border-right: 1px solid rgb(0, 153, 204); background: rgb(221, 237, 251); overflow: hidden; border-left: 1px solid rgb(0, 153, 204); word-break: break-all; border-bottom: 1px solid rgb(0, 153, 204); word-wrap: break-word; font-family: tahoma, arial, "Microsoft YaHei";'>
<br>
add_filter('wp_mail_content_type', 'sola520_use_html'); <br>
function sola520_use_html( $content_type ) { <br>
if( '你的条件' ) <br>
return 'text/html'; <br>
else <br>
return $content_type; <br>
} </p>
<p>
<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><strong style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>方法二，用$headers实现 </strong><br><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>只要在header中指定content-type为text/html，wp_mail()就会用html格式发送邮件。 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>
</p>
<div style='margin: 3px auto 0px; padding: 0px 3px; outline: none; line-height: 21.6px; clear: both; border-width: 1px; border-style: solid; border-color: rgb(0, 153, 204); background: rgb(246, 251, 255); overflow: hidden; font-family: tahoma, arial, "Microsoft YaHei";'>
<p style="margin: 0px; padding: 0px; outline: none; float: right; line-height: 25.2px; font-size: 14px;">
<span style="line-height: 25.2px; cursor: pointer;"><u>复制代码</u></span></p>
<p>
代码如下:</p>
</div>
<p style='margin: 0px auto 3px; padding: 0px 3px; outline: none; line-height: 25.2px; font-size: 14px; clear: both; border-right: 1px solid rgb(0, 153, 204); background: rgb(221, 237, 251); overflow: hidden; border-left: 1px solid rgb(0, 153, 204); word-break: break-all; border-bottom: 1px solid rgb(0, 153, 204); word-wrap: break-word; font-family: tahoma, arial, "Microsoft YaHei";'>
<br>
$headers = "MIME-Version: 1.0\n" . "Content-Type: text/html;"; <br>
wp_mail('me@example.net', 'The subject', '<p>The <em>HTML</em> message</p>', $headers); </p>
<p>
<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>这样不用担心影响其它邮件，更省事了，适合发送自定义邮件。</span></p>
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