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Posted by Timothy Madden on 04/27/07 13:27
Willem Bogaerts wrote:
>> Is there a function that will allow me to
>> output text written in utf-8 (from db for example)
>> if my document has
>>
>> Content-Type: text/html; charset=ISO-8859-1
>>
>> I mean htmlspecialchars() and htmlentities() will only convert
>> characters that have an associated entity defined in HTML.
>> I would also like to translate all non-latin1 characters using
>> numeric references.
>
> There are two terms of interest here: "character set" and "encoding"
>
> ISO-8859-1 is an encoding that only covers a limited character set. So
> there is no euro sign, for example. The Bad thing about ISO-8859-1 is
> that some programs silently replace it with cp-1252, which is similar
> but not exactly the same (it does have a euro sign).
>
>
>> ţ is for a Romanian letter, ţ, for example, and letter ţ
>> written in UTF-8 is not translated by htmlentities(), even if
>> I give the function the optional character-set argument, 'UTF-8'
>> (you can actually see the letter I typed if your system and your
>> news reader understand and can display ISO latin 2 characters,
>> encoded in utf-8).
>
> So you want to encode characters that are NOT in the character set you
> explicitly state. If you do want those characters, why do you state an
> encoding that does not cover them? If you do want those characters, use
> a character set that does have them (like unicode) and an encoding that
> covers them (utf-8 is fairly common).
>
>> I mean HTML documents can use characters in the entire UNICODE
>> set, even if the document source is written in ASCII for example,
>> by encoding any non-ASCII character with HTML entities.
>
> Are you sure about that?
>
>> Is there in PHP a function that will encode in HTML all non-ASCII
>> characters, or all non-latin1 characters, or all characters not in the
>> source character set ?
>
> The htmlentities function does have an encoding parameter, but you have
> already used that. As for numeric entities, I expect them to be
> encoding-specific.
>
> Best regards,
As I know ISO-8859-1 is a set (of characters).
As you can see in the official HTML 4.01 specification
http://www.w3.org/TR/html401/charset.html#h-5.1
that all HTML documents use UCS defined by ISO10646, which is
identical to UNICODE.
Numeric character references can be used whatever encoding
you chose for your document source, and they always refer to
characters in UCS by their code position.
Timothy Madden,
Romania
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