正则表达式，匹配标签之间的换行符 [英] Regex, match newlines between tags

问题描述

我在 PHP 中有这个正则表达式:

I have this regex in PHP:

preg_match('/\[summary\](.+)\[\/summary\]/i', $data['text'], $match);

当摘要标签之间的文本在一行上时，它工作正常.但是，当它包含换行符时，它不匹配.

It works fine when the text between the summary tags is on one line. However, when it contains newlines, it doesn't match.

我试图在这里找到正确的修饰符:http://nl2.php.net/manual/en/reference.pcre.pattern.modifiers.php但是与换行符相关的唯一一个是m"，这不是我想要的.

I've tried to find a correct modifier here: http://nl2.php.net/manual/en/reference.pcre.pattern.modifiers.php But the only one related to newlines is "m" and that doesn't do what I want.

如何进行这项工作?

推荐答案

您链接到的手册页描述了另一个影响换行处理方式的选项.

The man page you've linked to describes another options that has an effect on how line breaks are handled.

s (PCRE_DOTALL)如果设置了此修饰符，则模式中的点元字符匹配所有字符，包括换行符.没有它，换行符被排除在外.此修饰符等效于 Perl 的/s 修饰符.否定类如 [^a] 始终匹配换行符，与此修饰符的设置无关.

s (PCRE_DOTALL) If this modifier is set, a dot metacharacter in the pattern matches all characters, including newlines. Without it, newlines are excluded. This modifier is equivalent to Perl's /s modifier. A negative class such as [^a] always matches a newline character, independent of the setting of this modifier.

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