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Asked: 2026-05-25T09:55:48+00:00

I have a weird whitespaces in string, white spaces are not white spaces. I

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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);

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

instead of white space.

What I am trying to achieve is to run this regex 

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

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

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1 Answer

  1. Editorial Team

    I think I got it, from PHP site:

    You might wonder why 

    trim(html_entity_decode(' '));

    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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