HTML5使用包含引号的模式验证文本输入 [英] HTML5 Validate Text input using pattern containing quote
问题描述
这不是帮助我构建我的正则表达式"问题之一.我有一个HTML表单输入字段，用户可以在其中输入各种格式的地理位置数据.以下正则表达式可以在 regexr.com 以及我的应用程序中正常运行.但是，我想使用HTML5的"pattern"参数在提交之前另外验证用户的输入.
This is not one of these "help me build my regex" questions. I have an HTML form input field where a user can provide geographical position data in various formats. The following regex works fine in regexr.com as well as in my application. However, I want to use the "pattern" parameter of HTML5 to additionally validate a user's input before submitting it.
((([E|W|N|S](\s)?)?([\-]?[0-1]?[(0-9)]{1,2})[°][ ]?([(0-5)]?[(0-9)]{1})([\.|,][0-9]{1,5})?['][ ]?([0-5]{0,1}[0-9]?(([\.|\,])[0-9]{0,3})?)([\"]|[']{2}){0,1}((\s)?[E|W|N|S])?)|([-]?[1]?[0-9]{1,2}[\.|,][0-9]{1,9}))
关键是该正则表达式包含一个引号().现在，我将该正则表达式放在输入中，如下所示:
The point is that this regex contains a quote character ("). Now, I put this regex in my input like this:
<input type="text" pattern = "regex..."...." />
浏览器无法识别此正则表达式，并且根本不进行任何验证，因此，显然我需要转义该引用.到目前为止，我尝试过的事情:
Browsers do not recognize this regex and don't do any validation at all, so obviously I need to escape that quote. What I tried so far:
- PHP的addslashes()函数转义了太多字符.
- 我用一个反斜杠转义了报价
那并没有改变任何东西.我在Chrome上进行了测试，该Chrome可以与简单的正则表达式配合使用.上面的那个显然太复杂了.
That did not change anything. I tested with Chrome, which works fine with simple regular expressions. The one above obviously is a bit too complicated.
我知道上面的正则表达式对于匹配坐标并不理想，但是，这里不做讨论.我只是想知道如何正确地转义HTML5中的模式，因为Chrome对该正则表达式不做任何事情.
I know the regular expression above is not perfect for matching coordinates, however, this is not to be discussed here. I just would like to know how to correctly escape a pattern in HTML5 as Chrome does not do anything with that regex.
推荐答案
使用HTML实体:
- 代替
'使用' - 代替
"使用"
- instead of
'use' - instead of
"use"
如果使用PHP创建正则表达式，则可以使用htmlentities()使用HTML实体对字符串进行编码.默认情况下，这只会对双引号进行编码，但是您可以使用ENT_QUOTES选项对两种类型的引号进行编码.
If you're creating the regexp using PHP, you can use htmlentities() to encode a string using HTML entities. By default, this will just encode double quotes, but you can use the ENT_QUOTES option to encode both types of quotes.
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