Does html_entity_decode replaces   also? If not how to replace it?

I have a situation where I am passing a string to a function. I want to convert   to " " (a blank space) before passing it to function. Does html_entity_decode does it?

If not how to do开发者_如何学运维 it?

I am aware of str_replace but is there any other way out?

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Quote from html_entity_decode() manual:

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.

You can use str_replace() to replace the ascii character #160 to a space:

<?php
$a = html_entity_decode('>&nbsp;<');
echo 'before ' . $a . PHP_EOL;
$a = str_replace("\xA0", ' ', $a);
echo ' after ' . $a . PHP_EOL;

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html_entity_decode does convert   to a space, just not a "simple" one (ASCII 32), but a non-breaking space (ASCII 160) (as this is the definition of  ).

If you need to convert to ASCII 32, you still need a str_replace(), or, depending on your situation, a preg_match("/s+", ' ', $string) to convert all kinds of whitespace to simple spaces.

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YES

See PHP manual http://php.net/manual/en/function.html-entity-decode.php.

Carefully read the Notes, maybe that s the issue you are facing：

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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Not sure if it is a viable solution for most cases but I used trim(strip_tags(html_entity_decode(htmlspecialchars_decode($html), ENT_QUOTES, 'UTF-8')));in my most recent application. The addition of htmlspecialchars_decode() initially was the only thing that would actually strip them.