IOFactory.php

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<?php
if (!defined('PHPEXCEL_ROOT')) {
        define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../');
}

require_once PHPEXCEL_ROOT . 'PHPExcel.php';

require_once PHPEXCEL_ROOT . 'PHPExcel/Writer/IWriter.php';

require_once PHPEXCEL_ROOT . 'PHPExcel/Reader/IReader.php';


class PHPExcel_IOFactory
{       
        private static $_searchLocations = array(
                array( 'type' => 'IWriter', 'path' => 'PHPExcel/Writer/{0}.php', 'class' => 'PHPExcel_Writer_{0}' ),
                array( 'type' => 'IReader', 'path' => 'PHPExcel/Reader/{0}.php', 'class' => 'PHPExcel_Reader_{0}' )
        );
        
        private static $_autoResolveClasses = array(
                'Excel2007',
                'Excel5',
                'Serialized',
                'CSV'
        );
        
    private function __construct() { }
    
        public static function getSearchLocations() {
                return self::$_searchLocations;
        }
        
        public static function setSearchLocations($value) {
                if (is_array($value)) {
                        self::$_searchLocations = $value;
                } else {
                        throw new Exception('Invalid parameter passed.');
                }
        }
        
        public static function addSearchLocation($type = '', $location = '', $classname = '') {
                self::$_searchLocations[] = array( 'type' => $type, 'path' => $location, 'class' => $classname );
        }
        
        public static function createWriter(PHPExcel $phpExcel, $writerType = '') {
                // Search type
                $searchType = 'IWriter';
                
                // Include class
                foreach (self::$_searchLocations as $searchLocation) {
                        if ($searchLocation['type'] == $searchType) {
                                $className = str_replace('{0}', $writerType, $searchLocation['class']);
                                $classFile = str_replace('{0}', $writerType, $searchLocation['path']);
                                
                                if (!class_exists($className)) {
                                        require_once PHPEXCEL_ROOT . $classFile;
                                }
                                
                                $instance = new $className($phpExcel);
                                if (!is_null($instance)) {
                                        return $instance;
                                }
                        }
                }
                
                // Nothing found...
                throw new Exception("No $searchType found for type $writerType");
        }
        
        public static function createReader($readerType = '') {
                // Search type
                $searchType = 'IReader';
                
                // Include class
                foreach (self::$_searchLocations as $searchLocation) {
                        if ($searchLocation['type'] == $searchType) {
                                $className = str_replace('{0}', $readerType, $searchLocation['class']);
                                $classFile = str_replace('{0}', $readerType, $searchLocation['path']);
                                
                                if (!class_exists($className)) {
                                        require_once PHPEXCEL_ROOT . $classFile;
                                }
                                
                                $instance = new $className();
                                if (!is_null($instance)) {
                                        return $instance;
                                }
                        }
                }
                
                // Nothing found...
                throw new Exception("No $searchType found for type $readerType");
        }
        
        public static function load($pFilename) {
                $reader = self::createReaderForFile($pFilename);
                return $reader->load($pFilename);
        }

        public static function createReaderForFile($pFilename) {
                // Try loading using self::$_autoResolveClasses
                foreach (self::$_autoResolveClasses as $autoResolveClass) {
                        $reader = self::createReader($autoResolveClass);
                        if ($reader->canRead($pFilename)) {
                                return $reader;
                        }
                }

                throw new Exception("Could not automatically determine PHPExcel_Reader_IReader for file.");
        }
}