問題描述

我有一個電子郵件系統，用戶可以在其中寫一條消息，然后發送消息.我剛剛發現的主要問題，考慮這段代碼

I have an email system, where user write a message and it will send the message. The main problem which I just found, consider this code

    $findEmail = $this->Data->field('body', array('id' => 1610));

    //$getUserEmailTemplate will take frm dbase and e.g: 
    //Hi, @@MESSAGE@@. From: StackOverflow
    //It should change @@MESSAGE@@ part to data from $findEmail (in this example is the $74.97 ...)

    $getUserEmailTemplate = $findUser['User']['email_template'];
    $emailMessage = preg_replace('/B@@MESSAGE@@B/u', $findEmail, $getUserEmailTemplate);

    debug($findEmail);
    debug($emailMessage);

并為 $findemail 結果的電子郵件考慮此輸入:

and consider this input for the email for $findemail result:

$74.97
$735.00s

$email 消息將導致:

$email Message will result in:

.97
5.00s

我該如何解決這個問題?我覺得我的 preg_replace 模式有問題.

How can I fix this? I feel like there's problem with my preg_replace pattern.

用戶模板可以是任何東西，只要有@@MESSAGE@@，那部分就變成了用戶消息輸入.

User template can be anything, as long as there is @@MESSAGE@@ which, that part will be changed to the user message input.

謝謝

推薦答案

預解析替換文本以在后跟數字時轉義 $(記住 $n> 在替換文本中使用時具有特殊含義).請參閱 php.net 文檔頁面上的評論:

Pre-parse the replacement text to escape the $ when followed by a number (remember that $n has special meaning when using in the replacement text). See the comment on the php.net docs page:

如果您的替換文本有可能包含任何字符串，例如$0.95"，你需要避開那些 $n 反向引用:

If there's a chance your replacement text contains any strings such as "$0.95", you'll need to escape those $n backreferences:

<?php
  function escape_backreference($x){
    return preg_replace('/$(d)/', '\$$1', $x);
  }
?>

這篇關于preg_replace 導致美元符號被刪除的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！