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字符串之前的标签

php - 删除
字符串之前的标签

问题描述

我正在使用我的 php 从电子邮件正文中获取电子邮件数据。<br />我在删除字符串之前的标签时遇到了问题This message was created。

这是完整的电子邮件正文：

<br />
<br />
This message was created automatically by mail delivery software.<br />
<br />
A message that you sent could not be delivered to one or more of its<br />
recipients. This is a permanent error. The following address(es) failed: 
<br />
<br />
   fvsafsafsaf@shitmail.com<br />
      retry timeout exceeded

我试过这个：

$top_message = str_replace('<br /> <br /> This message', 'This message', $top_message);

我也试过这个：

$top_message = str_replace('<br /> <br />', '', $top_message);

它不会删除<br />字符串之前的标签，也不会发生任何事情。

这是完整的代码：

$body = imap_body($mailbox, $email_number, 2);
$email_body = utf8_decode(imap_utf8($body));

$top_message = getBetween($email_body, 'charset=us-ascii', 'exceeded') . 'exceeded';       
$top_message = nl2br($top_message);
$top_message = str_replace('<br /> <br /> This message', 'This message', $top_message);
echo $top_message

我想要实现的是，当我从电子邮件正文中获取电子邮件数据时，我想使用为每一行nl2br添加<br />标签，然后我想删除<br />字符串之前的两个标签This message was created。

我想让它显示如下：

This message was created automatically by mail delivery software.<br />
<br />
A message that you sent could not be delivered to one or more of its<br />
recipients. This is a permanent error. The following address(es) failed: 
<br />
<br />
   name@example.com<br />
      retry timeout exceeded

你能告诉我一个例子，我如何能够删除<br />字符串之前的两个标签？

谢谢你。

标签： phpstr-replace

解决方案

preg_replace与以下正则表达式一起使用： /^(<br\s*\/>\s*)*/.

它将删除<br/>消息开头的所有标签。

$str = "<br />
<br />
This message was created automatically by mail delivery software.<br />
<br />
A message that you sent could not be delivered to one or more of its<br />
recipients. This is a permanent error. The following address(es) failed: 
<br />
<br />
   fvsafsafsaf@shitmail.com<br />
      retry timeout exceeded";

print_r(preg_replace('/^(<br\s*\/>\s*)*/', '', $str));

输出：

This message was created automatically by mail delivery software.<br />
<br />
A message that you sent could not be delivered to one or more of its<br />
recipients. This is a permanent error. The following address(es) failed: 
<br />
<br />
   fvsafsafsaf@shitmail.com<br />
      retry timeout exceeded

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