正则表达式查找多行字符串，其中包含行之间的另一个字符串 [英] Regex to find a multi line string that includes another string between lines

问题描述

我在这里的第一个问题.

my first Q here.

我有一个日志文件，其中包含多个与命中相似的字符串:

I have a log file that has multiple similar strings as hits:

Region: AR
OnlineID: Atl_Tuc
---Start---
FIFA 18 Legacy Edition
---END---

Region: FR
OnlineID: jubtrrzz
---Start---
FIFA 19
Undertale
Pro Evolution Soccer™ 2018
---END---

Region: US
OnlineID: Cu128yi
---Start---
KINGDOM HEARTS HD 1.5 +2.5 ReMIX
---END---

Region: RO
OnlineID: Se116
---Start---
Real Farm
EA SPORTS™ FIFA 20
LittleBigPlanet™ 3
---END---

Region: US
OnlineID: CAJ5Y
---Start---
Madden NFL 18: G.O.A.T. Super Bowl Edition
---END---

我想找到所有包含 fifa(fifa 作为字符串)的点击.以国际足联为例，我需要找到包含一些字符串的所有命中.

I wanna find all hits which contain fifa (fifa as a string). Fifa is example, I need to find all hits which contain some strings.

我能找到的最后一件事是这个正则表达式:(?s)(?=^\r\n)(.*?)(fifa)(.*?)(?=\r\n\r\n)

The last thing I could find is this regex: (?s)(?=^\r\n)(.*?)(fifa)(.*?)(?=\r\n\r\n)

但是当我使用它时，它会选择所有命中，包括没有 fifa 的命中，直到它在命中中找到 fifa，所以它有时会选择 1 个以上的命中 像这样.

But when I use this, it selects all hits including hits with no fifa, until it finds a fifa in a hit, so it selects more than 1 hit sometimes like this.

第二个问题是我不能在 (fifa) bcz 中使用 .* 它会导致错误的选择.

Second problem is I can't use .* in (fifa) bcz it causes wrong selection.

我现在能做什么?

正确的输出应该是这样的:

The right output should be like this:

Region: AR
OnlineID: Atl_Tuc
---Start---
FIFA 18 Legacy Edition
---END---

Region: FR
OnlineID: jubtrrzz
---Start---
FIFA 19
Undertale
Pro Evolution Soccer™ 2018
---END---

Region: RO
OnlineID: Se116
---Start---
Real Farm
EA SPORTS™ FIFA 20
LittleBigPlanet™ 3
---END---

推荐答案

可以使用

(?si)(?:^(?<!.)|\R{2})\K(?:(?!\R{2}).)*?\bfifa\b.*?(?=\R{2}|\z)

查看正则表达式演示

详情

• (?si) - s 使 . 匹配换行符字符(与 . 相同)匹配换行符 ON)和不区分大小写的匹配ON
• (?:^(?<!.)|\R{2}) - 匹配文件的开头或两个换行符序列
• \K - 省略匹配的换行符
• (?:(?!\R{2}).)*? - 任何字符，出现 0 次或多次但尽可能少，不要开始双换行序列
• \bfifa\b - 全字 fifa
• .*? - 尽可能少的任何 0+ 个字符
• (?=\R{2}|\z) - 直到双换行符或文件结尾.

• (?si) - s makes . match line break chara (same as . matches newline ON) and case insensitive matching ON
• (?:^(?<!.)|\R{2}) - matches start of a file or two line break sequences
• \K - omits the matched line breaks
• (?:(?!\R{2}).)*? - any char, 0 or more occurrences but as few as possible, not starting a double line break sequence
• \bfifa\b - whole word fifa
• .*? - any 0+ chars as few as possible
• (?=\R{2}|\z) - up to the double line break or end of file.

现在，如果您想将一个段落与 fifa 和 20 匹配在其某些行上，请使用

Now, if you want to match a paragraph with fifa and then 20 on some of its line, use

(?si)(?:^(?<!.)|\R{2})\K(?:(?!\R{2}).)*?(?-s:\bfifa\b.*\b20\b).*?(?=\R{2}|\z)

(?-s:\bfifa\b.*\b20\b) 是一个修饰符组，其中 . 停止匹配换行符，它匹配一个整体单词 fifa，然后是除换行符以外的任何 0+ 个字符，尽可能多，然后是 20 作为一个完整的单词.

The (?-s:\bfifa\b.*\b20\b) is a modifier group where . stops matching line breaks, and it matches a whole word fifa, then any 0+ chars other than line break chars, as many as possible, and then a 20 as a whole word.

请参阅此正则表达式演示.

这篇关于正则表达式查找多行字符串，其中包含行之间的另一个字符串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！