php - Character Encoding/decoding becomes a mess -

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in webapp place <div id="xxx" contenteditable=true > editing purpose. encodeuricomponent(xxx.innerhtml) send via ajax post type server, php script creates simple txt file in turn can downloaded user store locally or print on screen. works perfect far, … yes, but, character encoding mess. special characters german Ä interpretated wrong. in case ä google days , study php methods iconv() , know how set browsers character encoding , set text editor correct correspondending decoding. nothing helps, still messs, or becoming weired.

so question : in encoding/decoding roundtrip browser server , browser have what, ensure Ä still Ä ?

i answer question, because turns out problem stated above. contenteditable part of section of html code. on serverside php need filter out contenteditable text via domdocument this:

$doc = new domdocument(); $doc->loadhtml($_post["data"]);

then access elements , textual content usual. save text 

file_put_contents($txtfile,  $plaintext, lock_ex);

the saved text mess written above. turns out need tell domdocument character set wich loadhtml() has interpretate. in case utf-8. first did recommended in php way :

$doc = new domdocument('1.0', 'utf-8');

but doesn't (i wonder). found this answer in so. , final solution :

$doc->loadhtml('<?xml encoding="utf-8">' . $_post["data"]);

though works trick. question left over, how right way ? if somebedoy has definite answer, welcome.


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