ZipStreamWrapper.php

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<?php
class PHPExcel_Shared_ZipStreamWrapper {
    private $_archive;

    private $_fileNameInArchive = '';

    private $_position = 0;

    private $_data = '';

    public static function register() {
                @stream_wrapper_unregister("zip");
                @stream_wrapper_register("zip", __CLASS__);
    }

    public function stream_open($path, $mode, $options, &$opened_path) {
        // Check for mode
        if ($mode{0} != 'r') {
            throw new Exception('Mode ' . $mode . ' is not supported. Only read mode is supported.');
        }

                $pos = strrpos($path, '#');
                $url['host'] = substr($path, 6, $pos - 6); // 6: strlen('zip://')
                $url['fragment'] = substr($path, $pos + 1);

        // Open archive
        $this->_archive = new ZipArchive();
        $this->_archive->open($url['host']);

        $this->_fileNameInArchive = $url['fragment'];
        $this->_position = 0;
        $this->_data = $this->_archive->getFromName( $this->_fileNameInArchive );

        return true;
    }

    public function stream_stat() {
        return $this->_archive->statName( $this->_fileNameInArchive );
    }

    function stream_read($count) {
        $ret = substr($this->_data, $this->_position, $count);
        $this->_position += strlen($ret);
        return $ret;
    }

    public function stream_tell() {
        return $this->_position;
    }

    public function stream_eof() {
        return $this->_position >= strlen($this->_data);
    }

    public function stream_seek($offset, $whence) {
        switch ($whence) {
            case SEEK_SET:
                if ($offset < strlen($this->_data) && $offset >= 0) {
                     $this->_position = $offset;
                     return true;
                } else {
                     return false;
                }
                break;

            case SEEK_CUR:
                if ($offset >= 0) {
                     $this->_position += $offset;
                     return true;
                } else {
                     return false;
                }
                break;

            case SEEK_END:
                if (strlen($this->_data) + $offset >= 0) {
                     $this->_position = strlen($this->_data) + $offset;
                     return true;
                } else {
                     return false;
                }
                break;

            default:
                return false;
        }
    }
}