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Tweak Accept-Language sorting method to respect RFC 3282.

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Now in Accept-Language handling (in the language converter),
languages appearing earlier in the list are treated as more
preferred languages (variants).

Change-Id: Ic50d01f52dce1ae1f4f4e747d5f8b8399ca03b0b
This commit is contained in:
Liangent 2012-05-28 18:51:53 +08:00
parent e1af77757a
commit 894c5c108d
1 changed files with 16 additions and 9 deletions
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25
includes/WebRequest.php
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@ -981,7 +981,8 @@ HTML;
/**
* Parse the Accept-Language header sent by the client into an array
* @return array array( languageCode => q-value ) sorted by q-value in descending order
* @return array array( languageCode => q-value ) sorted by q-value in descending order then
* appearing time in the header in ascending order.
* May contain the "language" '*', which applies to languages other than those explicitly listed.
* This is aligned with rfc2616 section 14.4
*/
@ -1004,19 +1005,25 @@ HTML;
return array();
}
// Create a list like "en" => 0.8
$langs = array_combine( $lang_parse[1], $lang_parse[4] );
$langcodes = $lang_parse[1];
$qvalues = $lang_parse[4];
$indices = range( 0, count( $lang_parse[1] ) - 1 );
// Set default q factor to 1
foreach ( $langs as $lang => $val ) {
if ( $val === '' ) {
$langs[$lang] = 1;
} elseif ( $val == 0 ) {
unset($langs[$lang]);
foreach ( $indices as $index ) {
if ( $qvalues[$index] === '' ) {
$qvalues[$index] = 1;
} elseif ( $qvalues[$index] == 0 ) {
$langcodes[$index] = '';
}
}
// Sort list
arsort( $langs, SORT_NUMERIC );
array_multisort( $qvalues, SORT_DESC, SORT_NUMERIC, $indices, $langcodes );
// Create a list like "en" => 0.8
$langs = array_combine( $langcodes, $qvalues );
if ( isset( $langs[''] ) ) {
unset( $langs[''] );
}
return $langs;
}