（php）regexto删除注释，但忽略字符串中的事件 [英] (php) regexto remove comments but ignore occurances within strings

问题描述

我正在写一个评论剥夺器，并试图适应所有的需求。我有以下堆栈的代码，删除几乎所有的评论，但它实际上走得太远。很多时间花在尝试和测试和研究正则表达式模式匹配，但我不声称他们是最好的每一个。

I am writing a comment-stripper and trying to accommodate for all needs here. I have the below stack of code which removes pretty much all comments, but it actually goes too far. A lot of time was spent trying and testing and researching the regex patterns to match, but I don't claim that they are the best at each.

我的问题是，我也有这样的情况，我有'PHP评论'（这不是真正意见的标准代码，或甚至在PHP字符串，我实际上不想删除。

My problem is that I also have situation where I have 'PHP comments' (that aren't really comments' in standard code, or even in PHP strings, that I don't actually want to have removed.

例如：

<?php $Var = "Blah blah //this must not comment"; // this must comment. ?>

最后发生的事情是很好，但它留下了一些问题：

What ends up happening is that it strips out religiously, which is fine, but it leaves certain problems:

<?php  $Var = "Blah blah  ?>

另外：

也会导致问题，因为注释删除了其余的行，包括结尾？>

will also cause problems, as the comment removes the rest of the line, including the ending ?>

看到问题？所以这是我需要...

See the problem? So this is what I need...

• 需要忽略或中的注释字符


• PHP对同一行的注释使用双斜杠，应该删除可能只有注释本身，或应删除整个PHP的代码块。

现在，随时告诉我，如果有改善我可以在我现有的模式？ ：）

Here's the patterns I use at the moment, feel free to tell me if there's improvement I can make in my existing patterns? :)

$CompressedData = $OriginalData;
$CompressedData = preg_replace('!/\*.*?\*/!s', '', $CompressedData);  // removes /* comments */
$CompressedData = preg_replace('!//.*?\n!', '', $CompressedData); // removes //comments
$CompressedData = preg_replace('!#.*?\n!', '', $CompressedData); // removes # comments
$CompressedData = preg_replace('/<!--(.*?)-->/', '', $CompressedData); // removes HTML comments

您可以给我的任何帮助将非常感谢！ ：）

Any help that you can give me would be greatly appreciated! :)

推荐答案

如果要解析PHP，可以使用 token_get_all 以获取令牌。

If you want to parse PHP, you can use token_get_all to get the tokens of a given PHP code. Then you just need to iterate the tokens, remove the comment tokens and put the rest back together.

但是你需要一个单独的HTML注释过程，最好是一个真正的解析器（像 DOMDocument 提供的 DOMDocument :: loadHTML ）。

But you would need a separate procedure for the HTML comments, preferably a real parser too (like DOMDocument provides with DOMDocument::loadHTML).

这篇关于（php）regexto删除注释，但忽略字符串中的事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！