Googlebot得到一个错误

Question

我有我的多语言网站我的index.php下面的代码。每种可用的语言都有一个子目录。

<?php 


if (isset($_POST['URL']) && strlen($_POST['URL']) == 3) { 
     header("location: ".$_POST[URL]); 
} 
else { 

    function lixlpixel_get_env_var($Var) 
    { 
     if(empty($GLOBALS[$Var])) 
     { 
      $GLOBALS[$Var]=(!empty($GLOBALS['_SERVER'][$Var]))? 
      $GLOBALS['_SERVER'][$Var] : (!empty($GLOBALS['HTTP_SERVER_VARS'][$Var])) ? $GLOBALS['HTTP_SERVER_VARS'][$Var]:''; 
     } 
    } 

    function lixlpixel_detect_lang() 
    { 
     // Detect HTTP_ACCEPT_LANGUAGE & HTTP_USER_AGENT. 
     lixlpixel_get_env_var('HTTP_ACCEPT_LANGUAGE'); 
     lixlpixel_get_env_var('HTTP_USER_AGENT'); 

     $_AL=strtolower($GLOBALS['HTTP_ACCEPT_LANGUAGE']); 
     $_UA=strtolower($GLOBALS['HTTP_USER_AGENT']); 

     // Try to detect Primary language if several languages are accepted. 
     foreach($GLOBALS['_LANG'] as $K) 
     { 
      if(strpos($_AL, $K)===0) 
      return $K; 
     } 

     // Try to detect any language if not yet detected. 
     foreach($GLOBALS['_LANG'] as $K) 
     { 
      if(strpos($_AL, $K)!==false) 
      return $K; 
     } 
     foreach($GLOBALS['_LANG'] as $K) 
     { 
      if(preg_match("/[[(]{$K}[;,_-)]/",$_UA)) 
      return $K; 
     } 

     // Return default language if language is not yet detected. 
     return $GLOBALS['_DLANG']; 
    } 

    // Define default language. 
    $GLOBALS['_DLANG']='en'; 

    // Define all available languages. 
    // WARNING: uncomment all available languages 

    $GLOBALS['_LANG'] = array(
    'en', // english. 
    'es', // spanish. 
    'fr', // french. 
    ); 

    /* 
    $GLOBALS['_LANG'] = array(
    'af', // afrikaans. 
    'ar', // arabic. 
    'bg', // bulgarian. 
    'ca', // catalan. 
    'cs', // czech. 
    'da', // danish. 
    'de', // german. 
    'el', // greek. 
    'en', // english. 
    'es', // spanish. 
    'et', // estonian. 
    'fi', // finnish. 
    'fr', // french. 
    'gl', // galician. 
    'he', // hebrew. 
    'hi', // hindi. 
    'hr', // croatian. 
    'hu', // hungarian. 
    'id', // indonesian. 
    'it', // italian. 
    'ja', // japanese. 
    'ko', // korean. 
    'ka', // georgian. 
    'lt', // lithuanian. 
    'lv', // latvian. 
    'ms', // malay. 
    'nl', // dutch. 
    'no', // norwegian. 
    'pl', // polish. 
    'pt', // portuguese. 
    'ro', // romanian. 
    'ru', // russian. 
    'sk', // slovak. 
    'sl', // slovenian. 
    'sq', // albanian. 
    'sr', // serbian. 
    'sv', // swedish. 
    'th', // thai. 
    'tr', // turkish. 
    'uk', // ukrainian. 
    'zh' // chinese. 
    ); 
    */ 

    // Redirect to the correct location. 


    header('location: /'.lixlpixel_detect_lang()); 
    //header('location: http://www.your_site.com/index_'.lixlpixel_detect_lang().'.php'); // Example Implementation 
    echo 'The Language detected is: '.lixlpixel_detect_lang(); // For Demonstration 

} 

>

的问题是，虽然在用户的浏览器这个完美的作品，与搜索引擎（如Googlebot）提供了以下错误抛出：

<br /> 
<b>Warning</b>: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Compilation failed: range out of order in character class at offset 12 in <b>/index.php</b> on line <b>41</b><br /> 
<br /> 
<b>Warning</b>: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Compilation failed: range out of order in character class at offset 12 in <b>/index.php</b> on line <b>41</b><br /> 
<br /> 
<b>Warning</b>: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Compilation failed: range out of order in character class at offset 12 in <b>/index.php</b> on line <b>41</b><br /> 
<br /> 
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /index.php:41) in <b>/index.php</b> on line <b>110</b><br /> 
<br /> 
<b>Warning</b>: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Compilation failed: range out of order in character class at offset 12 in <b>/index.php</b> on line <b>41</b><br /> 
<br /> 
<b>Warning</b>: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Compilation failed: range out of order in character class at offset 12 in <b>/index.php</b> on line <b>41</b><br /> 
<br /> 
<b>Warning</b>: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Compilation failed: range out of order in character class at offset 12 in <b>/index.php</b> on line <b>41</b><br /> 
The Language detected is: en 

我曾尝试错误处理但我不是PHP程序员，我是一名CF程序员，所以我真的需要一些帮助！

Answer 1

在character class的内部，-表示一个范围。在这种情况下，[;,_-)]中的_-)被解释为范围（_和)之间的每个字符）。但_（0x95）在)（0x28）之后，所以_-)是无效范围。

如果你指的是三个独立的角色_，-，并且)，逃避-：

[;,_\-)] 

从

除此之外，Accept-Language是加权值（见q参数）的列表。这意味着只是特定语言标签的出现并不一定意味着它是最受欢迎的语言。可能存在更优选的语言（更高的值q值）或甚至根本不被接受（即，q=0）。

因此，您应该更好地解析列表并找到首选语言和可用语言的最佳匹配，而不是仅仅查找特定语言标记的出现。