Zend FR

class Application_Analyzer_Accent extends Zend_Search_Lucene_Analysis_Analyzer_Common
{
    /**
     * Current char position in an UTF-8 stream
     *
     * @var integer
     */
    private $_position;

    /**
     * Current binary position in an UTF-8 stream
     *
     * @var integer
     */
    private $_bytePosition;

    /**
     * Object constructor
     *
     * @throws Zend_Search_Lucene_Exception
     */
    public function __construct()
    {
        if (@preg_match('/\pL/u', 'a') != 1) {
            // PCRE unicode support is turned off
            require_once 'Zend/Search/Lucene/Exception.php';
            throw new Zend_Search_Lucene_Exception('Utf8 analyzer needs PCRE unicode support to be enabled.');
        }
    }

    /**
     * Reset token stream
     */
    public function reset()
    {
        $this->_position     = 0;
        $this->_bytePosition = 0;

        // convert input into UTF-8
        if (strcasecmp($this->_encoding, 'utf8' ) != 0  &&
            strcasecmp($this->_encoding, 'utf-8') != 0 ) {
                $this->_input = iconv($this->_encoding, 'UTF-8', $this->_input);
                $this->_encoding = 'UTF-8';
        }
    }

    /**
     * Tokenization stream API
     * Get next token
     * Returns null at the end of stream
     *
     * @return Zend_Search_Lucene_Analysis_Token|null
     */
    public function nextToken()
    {
        if ($this->_input === null) {
            return null;
        }
        
        //$match = $this->deleteAccent($match);
        $this->_input = $this->deleteAccent($this->_input);
        $this->_input = strtolower($this->_input);
         
        do {
            if (! preg_match('/[\p{L}]+/u', $this->_input, $match, PREG_OFFSET_CAPTURE, $this->_bytePosition)) {
                // It covers both cases a) there are no matches (preg_match(...) === 0)
                // b) error occured (preg_match(...) === FALSE)
                return null;
            }
            
            // matched string
            $matchedWord = $match[0][0];

            // binary position of the matched word in the input stream
            $binStartPos = $match[0][1];

            // character position of the matched word in the input stream
            $startPos = $this->_position +
                        iconv_strlen(substr($this->_input,
                                            $this->_bytePosition,
                                            $binStartPos - $this->_bytePosition),
                                     'UTF-8');
            // character postion of the end of matched word in the input stream
            $endPos = $startPos + iconv_strlen($matchedWord, 'UTF-8');

            $this->_bytePosition = $binStartPos + strlen($matchedWord);
            $this->_position     = $endPos;

            $token = $this->normalize(new Zend_Search_Lucene_Analysis_Token($matchedWord, $startPos, $endPos));
        } while ($token === null); // try again if token is skipped
        //print_r($token);
        return $token;
    }
    
    private function deleteAccent($str)
    {
        return iconv('UTF-8', 'ASCII//TRANSLIT//IGNORE', $str);
    }
}

setlocale(LC_CTYPE, 'fr_FR.utf8');
        
Zend_Search_Lucene_Analysis_Analyzer::setDefault(new Application_Analyzer_Accent());

if (is_file(APPLICATION_PATH . '/data/index')) 
{ 
    $index = Zend_Search_Lucene::open(APPLICATION_PATH . '/data/index');  
} 
else 
{ 
    $index = Zend_Search_Lucene::create(APPLICATION_PATH . '/data/index');      
} 

$Branches = new Application_Model_Branches(array('ecoleId' => $this->ecole_id));
$results = $Branches->fetchAll();   
    
foreach ($results as $result) 
{
    $doc = new Zend_Search_Lucene_Document();
        
    $doc->addField(Zend_Search_Lucene_Field::Text('branche', $result->branche, 'utf-8'));
        
    $doc->addField(Zend_Search_Lucene_Field::Text('ar_branche', $result->arBranche, 'utf-8'));
        
    $index->addDocument($doc); 
}

$index->commit(); 
$index->optimize();

setlocale(LC_CTYPE, 'fr_FR.utf8');
Zend_Search_Lucene_Search_Query_Wildcard::setMinPrefixLength(0);

Zend_Search_Lucene_Analysis_Analyzer::setDefault(new Application_Analyzer_Accent());

$index = Zend_Search_Lucene::open( APPLICATION_PATH . '/data/index' );

$q = $this->_getParam('wath', '');
$results = $index->find('*"'.$q.'"*');

foreach ($results as $value)
{
    echo $value->branche . '<br />';
}