PHP 正则表达式任何字符
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PHP Regex Any Character
提问by Entity
The .character in a php regex accepts all characters, except a newline. What can I use to accept ALL characters, including newlines?
.php regex 中的字符接受除换行符之外的所有字符。我可以用什么来接受所有字符，包括换行符？
回答by Tomalak
This is commonly used to capture all characters:
这通常用于捕获所有字符：
[\s\S]
You could use any other combination of "Type-X + Non-Type-X" in the same way:
您可以以相同的方式使用“Type-X + Non-Type-X”的任何其他组合：
[\d\D]
[\w\W]
but [\s\S]is recognized by convention as a shorthand for "really anything".
但[\s\S]被惯例认可为“真正的任何东西”的简写。
You can also use the .if you switch the regex into "dotall" (a.k.a. "single-line") mode via the "s"modifier. Sometimes that's not a viable solution (dynamic regex in a black box, for example, or if you don't want to modify the entireregex). In such cases the other alternatives do the same, no matter how the regex is configured.
.如果您通过"s"修饰符将正则表达式切换到“dotall”（又名“单行”）模式，您也可以使用。有时这不是一个可行的解决方案（例如，黑盒中的动态正则表达式，或者如果您不想修改整个正则表达式）。在这种情况下，无论正则表达式如何配置，其他替代方案都会执行相同的操作。
回答by Vincent Savard
It's the the .character that means "every character" (edit: OP edited). And you need to add the option s to your regexp, for example :
它的.字符意味着“每个字符”（编辑：OP 编辑）。并且您需要将选项 s 添加到您的正则表达式中，例如：
preg_match("`(.+)`s", "\n");
回答by gnomed
would
将
[.\n]+
[.\n]+
not work?
不行？
How about (.|\n)+? I tested it and it seems to work.
怎么样(.|\n)+？我测试了它，它似乎有效。
I am quite sure this is the literal interpretation of exactly what you were asking for.
我很确定这正是您所要求的字面解释。
回答by Franco
The PHP Manual page for Dotstates that:
If the PCRE_DOTALL option is set, then dots match newlines as well.
如果设置了 PCRE_DOTALL 选项，则点也匹配换行符。
回答by steffen
An important thing is missing here. [\s\S]matches one character, whereas a newline can be a character sequence. (Windows uses two characters: \r\n.) Neither .(with DOT_ALLmodifier) nor [\s\S]will match the newline sequence. Best way to match any character or any newline is (.|\R), "everything except a newline or a newline". \Rmatches \n, \rand \r\n.
这里缺少一件重要的事情。[\s\S]匹配一个字符，而换行符可以是一个字符序列。（Windows 使用两个字符：\r\n.）.（使用DOT_ALL修饰符）也[\s\S]不会匹配换行符序列。匹配任何字符或任何换行符的最佳方法是(.|\R)“除换行符或换行符之外的所有内容”。\R匹配\n,\r和\r\n。
