选择并记住以下1个!!：）

[\s\S]*
[\w\W]*
[\d\D]*

解释:

\s:没有空白

\w:字\w:不字

\d:数字\d:不是数字

(如果你想要1个或更多字符[而不是0个或更多]，可以将*替换为+)。

附加编辑:

如果你想匹配一行中的所有内容，你可以使用这个:

[^\n]+

解释:

^:不

\ n: linebreak

+:表示1个字符或更多

(.*?)匹配任何东西-我已经使用它很多年了。

<?php
$str = "I bought _ sheep";
preg_match("/I bought (.*?) sheep", $str, $match);
print_r($match);
?>

http://sandbox.phpcode.eu/g/b2243.php

Regex: /I bought.*sheep./ Matches - the whole string till the end of line I bought sheep. I bought a sheep. I bought five sheep. Regex: /I bought(.*)sheep./ Matches - the whole string and also capture the sub string within () for further use I bought sheep. I bought a sheep. I bought five sheep. I boughtsheep. I bought a sheep. I bought fivesheep. Example using Javascript/Regex 'I bought sheep. I bought a sheep. I bought five sheep.'.match(/I bought(.*)sheep./)[0]; Output: "I bought sheep. I bought a sheep. I bought five sheep." 'I bought sheep. I bought a sheep. I bought five sheep.'.match(/I bought(.*)sheep./)[1]; Output: " sheep. I bought a sheep. I bought five "

通常点匹配除换行符以外的任何字符。

因此，如果。*不起作用，设置“点也匹配换行符”选项(或使用(?s).*)。

如果您正在使用JavaScript，它没有“dotall”选项，请尝试[\s\ s]*。这意味着“匹配任意数量的空白或非空白字符”——有效地“匹配任何字符串”。

另一个只适用于JavaScript的选项是[^]*，它也匹配任何字符串。但是[\s\ s]*似乎使用得更广泛，可能是因为它更便于携带。

我建议使用/(?=.*…)/g

例子

const text1 = 'I am using regex';
/(?=.*regex)/g.test(text1) // true

const text2 = 'regex is awesome';
/(?=.*regex)/g.test(text2) // true

const text3 = 'regex is util';
/(?=.*util)(?=.*regex)/g.test(text3) // true

const text4 = 'util is necessary';
/(?=.*util)(?=.*regex)/g.test(text4) // false because need regex in text

使用regex101进行测试