ZipArchive.php

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<?php
if (!defined('PCLZIP_TEMPORARY_DIR')) {
        define('PCLZIP_TEMPORARY_DIR', PHPExcel_Shared_File::sys_get_temp_dir() . DIRECTORY_SEPARATOR);
}
require_once PHPEXCEL_ROOT . 'PHPExcel/Shared/PCLZip/pclzip.lib.php';


class PHPExcel_Shared_ZipArchive
{

        const OVERWRITE         = 'OVERWRITE';
        const CREATE            = 'CREATE';


        private $_tempDir;

        private $_zip;


        public function open($fileName)
        {
                $this->_tempDir = PHPExcel_Shared_File::sys_get_temp_dir();

                $this->_zip = new PclZip($fileName);

                return true;
        }


        public function close()
        {
        }


        public function addFromString($localname, $contents)
        {
                $filenameParts = pathinfo($localname);

                $handle = fopen($this->_tempDir.'/'.$filenameParts["basename"], "wb");
                fwrite($handle, $contents);
                fclose($handle);

                $res = $this->_zip->add($this->_tempDir.'/'.$filenameParts["basename"],
                                                                PCLZIP_OPT_REMOVE_PATH, $this->_tempDir,
                                                                PCLZIP_OPT_ADD_PATH, $filenameParts["dirname"]
                                                           );
                if ($res == 0) {
                        throw new PHPExcel_Writer_Exception("Error zipping files : " . $this->_zip->errorInfo(true));
                }

                unlink($this->_tempDir.'/'.$filenameParts["basename"]);
        }

    public function locateName($fileName)
    {
        $list = $this->_zip->listContent();
        $listCount = count($list);
        $list_index = -1;
        for ($i = 0; $i < $listCount; ++$i) {
            if (strtolower($list[$i]["filename"]) == strtolower($fileName) ||
                strtolower($list[$i]["stored_filename"]) == strtolower($fileName)) {
                $list_index = $i;
                break;
            }
        }
        return ($list_index > -1);
    }

    public function getFromName($fileName) 
    {
        $list = $this->_zip->listContent();
        $listCount = count($list);
        $list_index = -1;
        for ($i = 0; $i < $listCount; ++$i) {
            if (strtolower($list[$i]["filename"]) == strtolower($fileName) ||
                strtolower($list[$i]["stored_filename"]) == strtolower($fileName)) {
                $list_index = $i;
                break;
            }
        }

        $extracted = "";
        if ($list_index != -1) {
            $extracted = $this->_zip->extractByIndex($list_index, PCLZIP_OPT_EXTRACT_AS_STRING);
        } else {
            $filename = substr($fileName, 1);
            $list_index = -1;
            for ($i = 0; $i < $listCount; ++$i) {
                if (strtolower($list[$i]["filename"]) == strtolower($fileName) || 
                    strtolower($list[$i]["stored_filename"]) == strtolower($fileName)) {
                    $list_index = $i;
                    break;
                }
            }
            $extracted = $this->_zip->extractByIndex($list_index, PCLZIP_OPT_EXTRACT_AS_STRING);
        }
        if ((is_array($extracted)) && ($extracted != 0)) {
            $contents = $extracted[0]["content"];
        }

        return $contents;
    }
}