phpspreadsheet 内存溢出处理|内存优化

Posted 2021-09-13 邓锋

phpspreadsheet 内存溢出处理|内存优化

设置缓存

节省内存: https://phpspreadsheet.readth...

这里我们使用

use Symfony\\Component\\Cache\\Adapter\\FilesystemAdapter;
use Symfony\\Component\\Cache\\Psr16Cache;
... 
$adapter = new FilesystemAdapter(\'excel\', 60*60*10, storage_path(\'framework/cache/data\'));
$cache = new Psr16Cache($adapter);
\\PhpOffice\\PhpSpreadsheet\\Settings::setCache($cache);

指定读取工作表

因为默认的情况下我们只需要读取某个工作表，如果您有多个工作表，但不需要全部加载，则可以使用setLoadSheetsOnly（）方法来限制Reader将加载的工作表。加载单个命名工作表

$inputFileType = \'Excel5\'; 
$inputFileName = \'./sampleData/example1.xls\';
$sheetname = \'Data Sheet #2\'; 
/**  Create a new Reader of the type defined in $inputFileType  **/
$objReader = PHPExcel_IOFactory::createReader($inputFileType);
/**  Advise the Reader of which WorkSheets we want to load  **/ 
$objReader->setLoadSheetsOnly($sheetname); 
/**  Load $inputFileName to a PHPExcel Object  **/
$objPHPExcel = $objReader->load($inputFileName);

或者可以通过传递名称数组来一次调用setLoadSheetsOnly（）来指定多个工作表

$inputFileType = \'Excel5\'; 
$inputFileName = \'./sampleData/example1.xls\';
$sheetnames = array(\'Data Sheet #1\',\'Data Sheet #3\'); 
/** Create a new Reader of the type defined in $inputFileType **/ 
$objReader = PHPExcel_IOFactory::createReader($inputFileType);
/** Advise the Reader of which WorkSheets we want to load **/ 
$objReader->setLoadSheetsOnly($sheetnames); 
/**  Load $inputFileName to a PHPExcel Object  **/
$objPHPExcel = $objReader->load($inputFileName);

循环读取excel的时候，断开sheet的链接

$m = memory_get_usage();
dump("初始化内存: " . $m);

$f = \'/www/wwwroot/trmk_service/storage/app/excel/app_75535bab9a72a/2021-04-07-feedback.xls\';
$f2 = \'/www/wwwroot/trmk_service/storage/app/excel/app_75535bab9a72a/2021-04-08-feedback.xls\';
$f3 = \'/www/wwwroot/trmk_service/storage/app/excel/app_75535bab9a72a/2021-04-09-feedback.xls\';

$s = \\PhpOffice\\PhpSpreadsheet\\IOFactory::load($f);
$s1 = memory_get_usage();
$s->disconnectWorksheets();
unset($s);
dump("内存使用率 s1: " . $s1);

$s = \\PhpOffice\\PhpSpreadsheet\\IOFactory::load($f2);
$s2 = memory_get_usage();
$s->disconnectWorksheets();
unset($s);
dump("内存使用率 s2: " . $s2);

$s = \\PhpOffice\\PhpSpreadsheet\\IOFactory::load($f);
$s3 = memory_get_usage();
$s->disconnectWorksheets();
unset($s);
dump("内存使用率 s3: " . $s3);


$s = \\PhpOffice\\PhpSpreadsheet\\IOFactory::load($f3);
$s4 = memory_get_usage();
$s->disconnectWorksheets();
unset($s);
dump("内存使用率 s4: " . $s4);

# 输出
> "初始化内存: 20429136"
> "内存使用率 s1: 25156120"
> "内存使用率 s2: 25264104"
> "内存使用率 s3: 25213496"
> "内存使用率 s4: 25234112"
> "exit"

参考

https://stackoverflow.com/que...

原文

https://surest.cn/archives/177/