private function createZip($pFilename)
    {
        // Create new ZIP file and open it for writing
        $zipClass = PHPExcel_Settings::getZipClass();
        $objZip = new $zipClass();

        // Retrieve OVERWRITE and CREATE constants from the instantiated zip class
        // This method of accessing constant values from a dynamic class should work with all appropriate versions of PHP
        $ro = new ReflectionObject($objZip);
        $zipOverWrite = $ro->getConstant('OVERWRITE');
        $zipCreate = $ro->getConstant('CREATE');

        if (file_exists($pFilename)) {
            unlink($pFilename);
        }
        // Try opening the ZIP file
        if ($objZip->open($pFilename, $zipOverWrite) !== true) {
            if ($objZip->open($pFilename, $zipCreate) !== true) {
                throw new PHPExcel_Writer_Exception("Could not open $pFilename for writing.");
            }
        }

        return $objZip;
    }
private function createZip($pFilename)
    {
        // Create new ZIP file and open it for writing
        $zipClass = PHPExcel_Settings::getZipClass();
        $objZip = new $zipClass();

        // Retrieve OVERWRITE and CREATE constants from the instantiated zip class
        // This method of accessing constant values from a dynamic class should work with all appropriate versions of PHP
        $ro = new ReflectionObject($objZip);
        $zipOverWrite = $ro->getConstant('OVERWRITE');
        $zipCreate = $ro->getConstant('CREATE');

        if (file_exists($pFilename)) {
            unlink($pFilename);
        }
        // Try opening the ZIP file
        if ($objZip->open($pFilename, $zipOverWrite) !== true) {
            if ($objZip->open($pFilename, $zipCreate) !== true) {
                throw new PHPExcel_Writer_Exception("Could not open $pFilename for writing.");
            }
        }

        return $objZip;
    }
private function createZip ( $ pFilename ) { // Create new ZIP file and open it for writing $ zipClass = PHPExcel_Settings :: getZipClass ( ) ; $ objZip = new $ zipClass ( ) ; // Retrieve OVERWRITE and CREATE constants from the instantiated zip class // This method of accessing constant values from a dynamic class should work with all appropriate versions of PHP $ ro = new ReflectionObject ( $ objZip ) ; $ zipOverWrite = $ ro -> getConstant ( 'OVERWRITE' ) ; $ zipCreate = $ ro -> getConstant ( 'CREATE' ) ; if ( file_exists ( $ pFilename ) ) { unlink ( $ pFilename ) ; } // Try opening the ZIP file if ( $ objZip -> open ( $ pFilename , $ zipOverWrite ) !== true ) { if ( $ objZip -> open ( $ pFilename , $ zipCreate ) !== true ) { throw new PHPExcel_Writer_Exception ( "Could not open $pFilename for writing." ) ; } } return $ objZip ; }
Create zip object

@param string $pFilename
@throws PHPExcel_Writer_Exception
@return ZipArchive
Create zip object