phpExcel大數據量情況下內存溢出解決

版本：1.7.6+

在不進行特殊設置的情況下，phpExcel將讀取的單元格信息保存在內存中，我們可以通過

PHPExcel_Settings::setCacheStorageMethod()

來設置不同的緩存方式，已達到降低內存消耗的目的！

1、將單元格數據序列化后保存在內存中

PHPExcel_CachedObjectStorageFactory::cache_in_memory_serialized; 

2、將單元格序列化后再進行Gzip壓縮，然后保存在內存中

PHPExcel_CachedObjectStorageFactory::cache_in_memory_gzip; 

3、緩存在臨時的磁盤文件中，速度可能會慢一些

PHPExcel_CachedObjectStorageFactory::cache_to_discISAM;

4、保存在php://temp

PHPExcel_CachedObjectStorageFactory::cache_to_phpTemp; 

5、保存在memcache中

PHPExcel_CachedObjectStorageFactory::cache_to_memcache

        $cacheMethod = PHPExcel_CachedObjectStorageFactory::cache_to_memcache;  
        $cacheSettings = array( 'memcacheServer'  => 'localhost',  
                        'memcachePort'    => 11211,  
                        'cacheTime'       => 600  
                      );  
        PHPExcel_Settings::setCacheStorageMethod($cacheMethod, $cacheSettings);

 

注意是加在new PHPExcel() 前面：如下

require_once APPPATH .'third_party/PHPExcel/PHPExcel.php';
        
        $cacheMethod = PHPExcel_CachedObjectStorageFactory::cache_to_phpTemp;
        $cacheSettings = array('memoryCacheSize'=>'16MB');
        PHPExcel_Settings::setCacheStorageMethod($cacheMethod, $cacheSettings);
        
        $objPHPExcel = new PHPExcel();