我们经常会使用phpExcel导入或导入xls文件,但是如果一次导出数据比较大就会出现内存溢出错误,下面我来总结解决办法
phpExcel将读取的单元格信息保存在内存中,我们可以通过
代码如下:
PHPExcel_Settings::setCacheStorageMethod()
来设置不同的缓存方式,已达到降低内存消耗的目的!
1、将单元格数据序列化后保存在内存中
代码如下:
PHPExcel_CachedObjectStorageFactory::cache_in_memory_serialized;
2、将单元格序列化后再进行Gzip压缩,然后保存在内存中
代码如下:
PHPExcel_CachedObjectStorageFactory::cache_in_memory_gzip;
3、缓存在临时的磁盘文件中,速度可能会慢一些
代码如下:
PHPExcel_CachedObjectStorageFactory::cache_to_discISAM;
4、保存在php://temp
代码如下:
PHPExcel_CachedObjectStorageFactory::cache_to_phpTemp;
5、保存在memcache中
代码如下:
PHPExcel_CachedObjectStorageFactory::cache_to_memcache
举例:
第4中方式:
代码如下:
$cacheMethod = PHPExcel_CachedObjectStorageFactory:: cache_to_phpTemp;
$cacheSettings = array( ' memoryCacheSize ' => '8MB'
);
PHPExcel_Settings::setCacheStorageMethod($cacheMethod, $cacheSettings);
第5种:
代码如下:
$cacheMethod = PHPExcel_CachedObjectStorageFactory::cache_to_memcache;
$cacheSettings = array( 'memcacheServer' => 'localhost',
'memcachePort' => 11211,
'cacheTime' => 600
);
PHPExcel_Settings::setCacheStorageMethod($cacheMethod, $cacheSettings);
其它的方法
第一个方法,你可以考虑生成多个sheet的方式,不需要生成多个excel文件,根据你数据总量计算每个sheet导出多少行, 下面是PHPExcel生成多个sheet方法:
面是PHPExcel生成多个sheet方法:
代码如下:
$sheet = $objPHPExcel->getActiveSheet();
$sheet->setCellValue('A1',$x);
$sheet->setCellValue('B1',$y);
第二个方法,你可以考虑ajax来分批导出,不用每次刷新页面。
代码如下:
export to Excel
$('#export').click(function() {
$.ajax({
url: "export.php",
data: getData(), //这个地方你也可以在php里获取,一般读数据库
success: function(response){
window.location.href = response.url;
}
})
});
代码如下:
//export.php
$data = $_POST['data'];
$xls = new PHPExcel();
$xls->loadData($formattedData);
$xls->exportToFile('excel.xls');
$response = array(
'success' => true,
'url' => $url
);
header('Content-type: application/json');
echo json_encode($response);
?>
数据量很大的话,建议采用第二种方法,ajax来导出数据,上面方法简单给了个流程,具体你自己补充!

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