html - Detect Browser Language in PHP and set $locale accordingly -


i'm trying achieve, when visits wordpress page .po (language-) packages of pefered language loaded. @ moment possible change language adding ?lang= parameter url. want right language selected based on browser language.

my code:

<?php // start session  session_start(); $browserlang = " ".$_server['http_accept_language'];  // if there's "lang" parameter in url...   if( isset( $_get[ 'lang' ] ) ) {       // ...set session variable named wplang based on url parameter...          $_session[ 'wplang' ] = $_get[ 'lang' ];       // ...and define wplang constant wplang session variable      $locale = $_session[ 'wplang' ];     echo 'based on url parameter';  // if there isn't "lang" parameter in url...   } else {      // if wplang session variable set...     if( isset( $_session[ 'wplang' ] ) ) {          // ...define wplang constant wplang session variable          $locale = $_session[ 'wplang' ];         echo 'based on session variable';     // if wplang session variable isn't set...    } else {           // set wplang constant default language code (or empty, if don't need it)                 $locale = $browserlang;         echo 'should based on browser language. is:' . $browserlang;      }  }; ?>

$locale used set language , select right .po files.

now want $locale

$locale = 'en_us'

by default, when enters page has default language "de", "de_de", "de_ch" or "de_at" should be.

$locale = 'de_de'

the code im using isnt working.

$browserlang = " ".$_server['http_accept_language']; echo $browserlang;

shows me right language, "de_de", $locale = $browserlang doesnt anything. on other hand when set $locale = 'de_de' works...

thank guys in advance.

edit:

when use echo $locale says de-de. thats stange, because doesnt work...

edit 2:

thats because must de_de (underline) not de-de (minus)... how fix that?

edit 3:

finally works.

shows me right language, "de_de",

it shouldn't. code you've shown inserts space before header value.

also, code not handle multi-valued accept-language header can include preferences (e.g. see here parser)

how normalize value ( {"de", "de_de", "de_ch","de_at"} -> "de_de" ) you.


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