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Date: Sun, 28 Dec 2025 11:53:20 +1300
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Subject: Re: [PHP-DEV] Add form feed as a whitespace character in trim, ltrim
 and rtrim
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From: weedpacket@varteg.nz (Morgan)

On 2025-12-27 23:38, LamentXU wrote:
> Hi Internals,
> 
> I have opened a Pull Request to add|\f| (form feed) to the list of 
> characters stripped by default in|trim()|,|ltrim()|, and|rtrim()|.
> 
> Currently, the default behavior of|trim()| strips the following 
> characters:|\n|,|\r|,|\t|,|\v|,|\0|, and space. The form feed character| 
> \f| is notably missing, despite being widely recognized as a whitespace 
> character (in python, rust...).
> 

Also in PHP, where ctype_space() recognises \f as whitespace as well as 
all of those that trim() removes. (As the name implies, of course, this 
is because \f is recognised as whitespace in C.)