如何排序UTF-8字符串数组？ [英] How to sort an array of UTF-8 strings?

问题描述

我currentyl对如何进行排序，其中包含UTF-8连接在PHP codeD字符串数组毫无头绪。该阵列来自LDAP服务器通过一个数据库，以便排序（会有问题）是无解的。
下面我的Windows开发机器上不工作（虽然我认为这应该是至少有一个可能的解决方案）：

I currentyl have no clue on how to sort an array which contains UTF-8 encoded strings in PHP. The array comes from a LDAP server so sorting via a database (would be no problem) is no solution. The following does not work on my windows development machine (although I'd think that this should be at least a possible solution):

$array=array('Birnen', 'Äpfel', 'Ungetüme', 'Apfel', 'Ungetiere', 'Österreich');
$oldLocal=setlocale(LC_COLLATE, "0");
var_dump(setlocale(LC_COLLATE, 'German_Germany.65001'));
usort($array, 'strcoll');
var_dump(setlocale(LC_COLLATE, $oldLocal));
var_dump($array);

输出是：

string(20) "German_Germany.65001"
string(1) "C"
array(6) {
  [0]=>
  string(6) "Birnen"
  [1]=>
  string(9) "Ungetiere"
  [2]=>
  string(6) "Äpfel"
  [3]=>
  string(5) "Apfel"
  [4]=>
  string(9) "Ungetüme"
  [5]=>
  string(11) "Österreich"
}

这完全是胡说八道。使用1252为codePAGE为的setlocale（）给出了另一个输出但仍然是一个完全错误之一：

This is complete nonsense. Using 1252 as the codepage for setlocale() gives another output but still a plainly wrong one:

string(19) "German_Germany.1252"
string(1) "C"
array(6) {
  [0]=>
  string(11) "Österreich"
  [1]=>
  string(6) "Äpfel"
  [2]=>
  string(5) "Apfel"
  [3]=>
  string(6) "Birnen"
  [4]=>
  string(9) "Ungetüme"
  [5]=>
  string(9) "Ungetiere"
}

有没有一种方法排序一个数组的UTF-8字符串区域设置知道？

Is there a way to sort an array with UTF-8 strings locale aware?

的就指出，这似乎是PHP在Windows上的问题，与 de_DE.utf8 相同片段用作语言环境的Linux机器上工作。不过这个Windows的具体问题的解决方案将是很好... 的

Just noted that this seems to be PHP on Windows problem, as the same snippet with de_DE.utf8 used as locale works on a Linux machine. Nevertheless a solution for this Windows-specific problem would be nice...

推荐答案

最后这个问题不能以简单的方式来解决，而无需使用重codeD字符串（UTF-8→Windows的1252或ISO-8859-1）如通过Huppie发现通过ΤΖΩΤΖΙΟΥ所建议，由于明显的PHP错误。
总结这个问题，我创建了以下code片段，清楚地表明，这个问题是与strcoll（）函数使用的Windows 65001 UTF-8 codePAGE时。

Eventually this problem cannot be solved in a simple way without using recoded strings (UTF-8 → Windows-1252 or ISO-8859-1) as suggested by ΤΖΩΤΖΙΟΥ due to an obvious PHP bug as discovered by Huppie. To summarize the problem, I created the following code snippet which clearly demonstrates that the problem is the strcoll() function when using the 65001 Windows-UTF-8-codepage.

function traceStrColl($a, $b) {
    $outValue=strcoll($a, $b);
    echo "$a $b $outValue\r\n";
    return $outValue;
}

$locale=(defined('PHP_OS') && stristr(PHP_OS, 'win')) ? 'German_Germany.65001' : 'de_DE.utf8';

$string="ABCDEFGHIJKLMNOPQRSTUVWXYZÄÖÜabcdefghijklmnopqrstuvwxyzäöüß";
$array=array();
for ($i=0; $i<mb_strlen($string, 'UTF-8'); $i++) {
    $array[]=mb_substr($string, $i, 1, 'UTF-8');
}
$oldLocale=setlocale(LC_COLLATE, "0");
var_dump(setlocale(LC_COLLATE, $locale));
usort($array, 'traceStrColl');
setlocale(LC_COLLATE, $oldLocale);
var_dump($array);

的结果是：

string(20) "German_Germany.65001"
a B 2147483647
[...]
array(59) {
  [0]=>
  string(1) "c"
  [1]=>
  string(1) "B"
  [2]=>
  string(1) "s"
  [3]=>
  string(1) "C"
  [4]=>
  string(1) "k"
  [5]=>
  string(1) "D"
  [6]=>
  string(2) "ä"
  [7]=>
  string(1) "E"
  [8]=>
  string(1) "g"
  [...]

同样的片段在Linux机器上工作，而不会产生以下输出的任何问题：

The same snippet works on a Linux machine without any problems producing the following output:

string(10) "de_DE.utf8"
a B -1
[...]
array(59) {
  [0]=>
  string(1) "a"
  [1]=>
  string(1) "A"
  [2]=>
  string(2) "ä"
  [3]=>
  string(2) "Ä"
  [4]=>
  string(1) "b"
  [5]=>
  string(1) "B"
  [6]=>
  string(1) "c"
  [7]=>
  string(1) "C"
  [...]

当使用Windows的1252（ISO-8859-1）EN codeD字符串（当然MB_ *编码和语言环境，必须再改）的片段也适用。

The snippet also works when using Windows-1252 (ISO-8859-1) encoded strings (of course the mb_* encodings and the locale must be changed then).

我提交的 bugs.php.net 一个bug报告：的错误＃46165的strcoll（）不与Windows UTF-8字符串工作。如果你遇到同样的问题，你可以给你的反馈，错误报告页面上的PHP团队（其他两个，可能是相关的，错误已被列为假的 - 我不认为这虫子的假的; - ）

I filed a bug report on bugs.php.net: Bug #46165 strcoll() does not work with UTF-8 strings on Windows. If you experience the same problem, you can give your feedback to the PHP team on the bug-report page (two other, probably related, bugs have been classified as bogus - I don't think that this bug is bogus ;-).

感谢大家。

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