奇怪的空格字符-utf8 PHP [英] weird white space characters - utf8 PHP

问题描述

我在字符串中有一个奇怪的空格，空格不是空格.我在使用regex和str_replace进行转换时遇到问题.

I have a weird whitespaces in string, white spaces are not white spaces. I have a problem with converting them with regex and str_replace i.e.

echo str_replace(' ','_',$string);

任何想法如何解决? utf8_encode也不起作用，正则表达式也不能，当您将此文本复制到Notepad ++时，它显示为

any ideas how to fix it? utf8_encode is also not working, regex \s either, when you copy this text to Notepad++ it shows as

Ê    

代替空格.

我想要实现的是运行此正则表达式

What I am trying to achieve is to run this regex

preg_replace('/[^a-z0-9 ]/i','',$string) 

但是由于那些空白"不是空白，它们也将被删除.

but since those 'whitespaces' are not a whitespaces they are being removed as well.

推荐答案

我想我是从PHP网站获得的:

I think I got it, from PHP site:

您可能想知道为什么

trim(html_entity_decode(' '));    

不会将字符串缩减为空字符串，这是因为' '实体不是默认ISO 8859-1字符集中的ASCII代码32(由trim()剥离)，而是ASCII代码160(0xa0).

doesn't reduce the string to an empty string, that's because the ' ' entity is not ASCII code 32 (which is stripped by trim()) but ASCII code 160 (0xa0) in the default ISO 8859-1 characterset.

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