Sphinx\SphinxClient::buildExcerpts PHP Method

    public function buildExcerpts(array $docs, $index, $words, array $opts = array())
    {
        foreach ($docs as $doc) {
            if (!is_string($doc)) {
                throw new \InvalidArgumentException('Document must be a string.');
            }
        }
        if (!is_string($index)) {
            throw new \InvalidArgumentException('Index name must be a string.');
        }
        if (!is_string($words)) {
            throw new \InvalidArgumentException('Keywords must be a string.');
        }
        $this->mbPush();
        if (!($fp = $this->connect())) {
            $this->mbPop();
            return false;
        }
        // default options
        $defaults = array('before_match' => '<b>', 'after_match' => '</b>', 'chunk_separator' => ' ... ', 'limit' => 256, 'limit_passages' => 0, 'limit_words' => 0, 'around' => 5, 'exact_phrase' => false, 'single_passage' => false, 'use_boundaries' => false, 'weight_order' => false, 'query_mode' => false, 'force_all_words' => false, 'start_passage_id' => 1, 'load_files' => false, 'html_strip_mode' => 'index', 'allow_empty' => false, 'passage_boundary' => 'none', 'emit_zones' => false, 'load_files_scattered' => false);
        foreach ($defaults as $opt => $default) {
            if (!isset($opts[$opt])) {
                $opts[$opt] = $default;
            }
        }
        // build request
        // v.1.2 req
        $flags = 1;
        foreach (array(2 => 'exact_phrase', 4 => 'single_passage', 8 => 'use_boundaries', 16 => 'weight_order', 32 => 'query_mode', 64 => 'force_all_words', 128 => 'load_files', 256 => 'allow_empty', 512 => 'emit_zones', 1024 => 'load_files_scattered') as $flag => $opt) {
            if ((bool) $opts[$opt]) {
                $flags |= $flag;
            }
        }
        // mode=0, flags=$flags
        $req = pack('NN', 0, $flags);
        $req .= pack('N', strlen($index)) . $index;
        $req .= pack('N', strlen($words)) . $words;
        // options
        $req .= pack('N', strlen($opts['before_match'])) . $opts['before_match'];
        $req .= pack('N', strlen($opts['after_match'])) . $opts['after_match'];
        $req .= pack('N', strlen($opts['chunk_separator'])) . $opts['chunk_separator'];
        $req .= pack('NN', (int) $opts['limit'], (int) $opts['around']);
        // v.1.2
        $req .= pack('NNN', (int) $opts['limit_passages'], (int) $opts['limit_words'], (int) $opts['start_passage_id']);
        $req .= pack('N', strlen($opts['html_strip_mode'])) . $opts['html_strip_mode'];
        $req .= pack('N', strlen($opts['passage_boundary'])) . $opts['passage_boundary'];
        // documents
        $req .= pack('N', count($docs));
        foreach ($docs as $doc) {
            $req .= pack('N', strlen($doc)) . $doc;
        }
        // send query, get response
        $len = strlen($req);
        // add header
        $req = pack('nnN', self::SEARCHD_COMMAND_EXCERPT, self::VER_COMMAND_EXCERPT, $len) . $req;
        if (!$this->send($fp, $req, $len + 8) || !($response = $this->getResponse($fp, self::VER_COMMAND_EXCERPT))) {
            $this->mbPop();
            return false;
        }
        // parse response
        $pos = 0;
        $res = array();
        $rlen = strlen($response);
        $ndoc = count($docs);
        for ($i = 0; $i < $ndoc; $i++) {
            list(, $len) = unpack('N*', substr($response, $pos, 4));
            $pos += 4;
            if ($pos + $len > $rlen) {
                $this->error = 'incomplete reply';
                $this->mbPop();
                return false;
            }
            $res[] = $len ? substr($response, $pos, $len) : '';
            $pos += $len;
        }
        $this->mbPop();
        return $res;
    }

 public function testBuildExcerptsWithUnicode()
 {
     $sphinx = new SphinxClient();
     $keyword = $this->utf16to8('65e5672c8a9e');
     $results = $sphinx->buildExcerpts(array($keyword), 'sphinxtest', $keyword);
     $this->assertEquals($results, array("<b>{$keyword}</b>"));
 }