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 "

对于JavaScript，最好和最简单的答案似乎是/.\*/。

正如其他人所建议的/(.*?)/也可以，但是/。\*/更简单。()里面的图案是不需要的，就我所见也没有结局?匹配任何内容(包括空字符串)

的办法:

/[\s\ s]/不匹配空字符串，因此不是解决方案。 /[\s\ s]\*/ DOES也匹配空字符串。但它有一个问题:如果你在代码中使用它，那么你就不能注释掉这样的代码，因为*/被解释为注释结束。

/([\s\ s]\*)/可以工作并且不存在注释问题。但是它比/.*/要长，理解起来也更复杂。

因为。查找单个字符，换行符或行结束符除外。

所以，要匹配任何东西，你可以这样使用:(.|\n)*?

希望能有所帮助!

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

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

使用.*，并确保您使用的实现相当于单行，以便在行尾匹配。

这里有一个很好的解释-> http://www.regular-expressions.info/dot.html

老实说，很多答案都是旧的，所以我发现，如果你只是简单地测试任何字符串，不管字符内容“/。*/i"将充分获得所有内容。