Question

我在数据库中保存了一个html代码。我想将特定的单词（例如：学校，书籍，chock）转换为链接（标签），我希望转换是安全的。

一种可能的方法是先删除所有标签，这样我就不会添加一个不应该的链接。但在这种情况下，我将放弃格式化，我不希望这样。

为了澄清这个问题，我将向您展示一些有问题的代码示例，如果我尝试将“书籍”更改为“书籍”，则会出现错误：

1.   <div class="books">lorem ipsum dolor....
2.   <a href = "http://www.example.com">all of the books in the store</a>

提前致谢！

Answer 1

这是一种使用字符串搜索和替换的方法。

for each word,
  do a search in the html code.
  for each found word,

    if there there is a "<" somewhere on the left side of the found word then

      if there is no ">" between the closest "<" and the start of the found word then
        The word is in a html tag? Ignore the word.
      end if
    end if

    if there is a "<a " somewhere on the left side of the word then
      if there is no "</a>" between the closest "<a " and the start of the found word then
        The word is already a link? Ignore the word.
      end if
    end if

    if none of the conditions above matches then
      Yeah! Found the word. Put in your link.
    end if
  end for
end for

如何使用PHP在html文档中安全地添加标签

1 个答案: