如何在php中删除单行注释（例如“ //删除此注释”）？ [英] How to remove single line comments in php (eg "// remove this comment")?

问题描述

我想使用正则表达式从代码中删除所有单行注释（例如 // comments ）。

I want to remove all single line comments (eg //comments) from my code using regular expression.

现在我正在使用： preg_replace（'/ \ / \ /(.*)/','',$ html）; 但它也会删除像 http://example.com 之类的字符串。

By now I'm using: preg_replace('/\/\/(.*)/','',$html); but it also removes strings like http://example.com.

推荐答案

您不能可靠地做到这一点。不能保证文件中任何位置的 // 都表示在PHP上下文中有注释。例如，它很可能包含在字符串中。

You cannot do this reliably. There is no guarantee that // at any position in a file indicates a comment in PHP context. It might very well be contained in a string for example.

只能通过一些让步来实现这一点。例如，如果在一行上捕获 //条评论就足够了，那么这将是一个误报较少的选项：

It's only possible to approach this with a few concessions. For example if it is sufficient if it catches // comments on a single line, then this would be an option with less false positives:

$source = preg_replace('#^\s*//.+$#m', "", $source);

真正的解决方案是利用语言解析器，但这显然太过分了。因此，请尝试添加一些启发式方法，以避免删除错误的地方。

The real solution would be utilize a language parser, but that's obviously overkill. So try with adding some heuristics to avoid removing wrong occourences.

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