插件8：拼写检查

<?php // Plug-in 8: Spell Check

// This is an executable example with additional code supplied
// To obtain just the plug-ins please click on the Download link

$text = "It was the best of tmes, it was the wrst of times, it was the age of wisdom, it was the age of foolishnes, it was the epoch of beleif, it was the epoch of incredulity, it was the season of Light, it was the season of Darkness, it was the spring of hope, it was the winter of despare, we had everything before us, we had nothing before us, we were all going drect to heaven.";

echo "$text<br /><br />";
echo PIPHP_SpellCheck($text, "u");

function PIPHP_SpellCheck($text, $action)
{
   // Plug-in 8: Spell Check
   //
   // This plug-in takes a string of text and then highlights
   // those words it doesn't recognise in the dictionary file.
   // The arguments required are:
   //
   //    $text:    Text to be modified
   //    $action:  What to do with unrecognized words:
   //              "u", "b", "i" = Underline, Bold or Italic

   $dictionary = PIPHP_SpellCheckLoadDictionary("dictionary.txt");
   $text      .= ' ';
   $newtext    = "";
   $offset     = 0;

   while ($offset < strlen($text))
   {
      preg_match('/[^\w]*([\w]+)[^\w]+/',
         $text, $matches, PREG_OFFSET_CAPTURE, $offset);
      $word   = $matches[1][0];
      $offset = $matches[0][1] + strlen($matches[0][0]);
      
      if (!PIPHP_SpellCheckWord($word, $dictionary))
         $newtext .= "<$action>$word</$action> ";
      else $newtext .= "$word ";
   }
   
   return rtrim($newtext);
}

function PIPHP_SpellCheckLoadDictionary($filename)
{
   return explode("\r\n", file_get_contents($filename));
}

function PIPHP_SpellCheckWord($word, $dictionary)
{
   $top = sizeof($dictionary) -1;
   $bot  = 0;
   $word = strtolower($word);

   while($top >= $bot)
   {
      $p =   floor(($top + $bot) / 2);
      if     ($dictionary[$p] < $word) $bot = $p + 1;
      elseif ($dictionary[$p] > $word) $top = $p - 1;
      else   return TRUE;
   }
     
   return FALSE;
}

?>

1. 插件说明：

插件8需要两个参数。一个代表需要拼写检查的字符串，另一个表示拼写检查后文本的显示方式。它们是：

$text 字符串变量，表示需要拼写检查的文本。

$action 字符串变量，它是一个字母，表示文本显示的格式。

dictionary.txt:

《太长了，省略。》