替换最后x个数字

问题描述

我有一个看起来像这样的PHP变量:

I have a PHP variable that looks a bit like this:

$id = "01922312";

我需要用另一个字符替换最后两个或三个数字.我该怎么做呢?

I need to replace the last two or three numbers with another character. How can I go about doing this?

编辑很抱歉，基本上我上面有变量，在完成处理后，我希望它看起来像这样:

EDIT Sorry for the confusion, basically I have the variable above, and after I'm done processing it I'd like for it to look something like this:

$new = "01922xxx";

推荐答案

尝试一下:

$new = substr($id, 0, -3) . 'xxx';

结果:

01922xxx

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