Javascript jQuery 中是否有与 PHP 的 `preg_replace()` 等效的东西？
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Is there an equivalent in jQuery to PHP's `preg_replace()`?
提问by Latox
Say I have the following:
说我有以下几点：
<img src="http://www.site.com/folder/pic.jpg">
This path could be anything, we basically want to get the "pic.jpg as a variable.
这个路径可以是任何东西，我们基本上想把“pic.jpg”作为一个变量。
Currently we are doing it like so:
目前我们是这样做的：
var first_img = $("#thumbnail-area li:first").find("img").attr("title");
Which sets the first_imgvariable as the image src, but we want to do a preg match kinda thing like in PHP to grab the "pic.jpg".
它将first_img变量设置为图像 src，但我们想要做一个类似于 PHP 的 preg 匹配来获取“pic.jpg”。
This has to work properly, so the path could be: folder/foo/bar/x982j/second822.jpgand it'd return second822.jpg
这必须正常工作，所以路径可能是：folder/foo/bar/x982j/second822.jpg并且它会返回second822.jpg
How can I do this?
我怎样才能做到这一点？
回答by alex
You could use replace()which is like PHP's preg_replace()(it too accepts a PCRE, with some limitations such as no look behinds)...
您可以使用replace()which 就像 PHP 一样preg_replace()（它也接受 PCRE，但有一些限制，例如没有回头看）...
str.replace(/.*\//, '')
Alternatively, you could use...
或者，您可以使用...
str.split('/').pop();
回答by Spudley
jQuery is not necessary here; Javascript supports regular expressions on its own, so jQuery is not part of the answer.
这里不需要 jQuery；Javascript 本身支持正则表达式，因此 jQuery 不是答案的一部分。
Javascript's regex replace function is simply called .replace(), and is a method on the string class. You would use it as follows:
Javascript 的正则表达式替换函数被简单地调用.replace()，并且是字符串类上的一个方法。您可以按如下方式使用它：
var mystring = 'this is a string';
mystring.replace(/is a/,'might be a');
//mystring is now equal to 'this might be a string'.
That should be enough to get you started. Since you referenced preg_replace()in the question, I assume you already know how to use regular expressions well enough not to need a detailed discussion of how to solve your specific example.
这应该足以让你开始。既然您preg_replace()在问题中引用了，我假设您已经知道如何很好地使用正则表达式，不需要详细讨论如何解决您的具体示例。
回答by John Keyes
Working example here: http://jsfiddle.net/jkeyes/sxx3T/
这里的工作示例：http: //jsfiddle.net/jkeyes/sxx3T/
var re = new RegExp(".*\/(.*)$");
var src="folder/foo/bar/x982j/second822.jpg";
var m = re.exec(src);
alert(m[1]); // first group
