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I've tried every method in the PHPExcel 1.7.8 manual for cell caching, but none work. I still run out of memory every time I try to load an Excel file of about 30 MB.

Here is my code:

    ini_set('memory_limit', '256M'); // Up from default 32MB

    require MODULES_DIR . '/PHPExcel.php';

    $cacheMethod = PHPExcel_CachedObjectStorageFactory::cache_to_discISAM;
    $cacheSettings = array('dir' => '/usr/local/tmp');
    PHPExcel_Settings::setCacheStorageMethod($cacheMethod, $cacheSettings);

    $inputFileType = PHPExcel_IOFactory::identify($dir . $source_file);

    $objReader = PHPExcel_IOFactory::createReader($inputFileType);

    $objReader->setReadDataOnly(true);

    $objPHPExcel = $objReader->load($dir . $source_file);

    $total_sheets = $objPHPExcel->getSheetCount();
    $allSheetName = $objPHPExcel->getSheetNames();

    $objWorksheet = $objPHPExcel->setActiveSheetIndex(0);

    $highestRow = $objWorksheet->getHighestRow();
    $highestColumn = $objWorksheet->getHighestColumn();

    $headingsArray = $objWorksheet->rangeToArray('A1:'.$highestColumn.'1',null, true, true, true);
    $headingsArray = $headingsArray[1];

    $r = -1;
    $namedDataArray = array();

    for ($row = 2; $row <= $highestRow; ++$row) {
        $dataRow = $objWorksheet->rangeToArray('A'.$row.':'.$highestColumn.$row,null, true, true, true);

        if ((isset($dataRow[$row]['A'])) && ($dataRow[$row]['A'] > '')) {
            ++$r;

            foreach($headingsArray as $columnKey => $columnHeading) {
                $namedDataArray[$r][$columnHeading] = $dataRow[$row][$columnKey];
            }
        }
    }

I've tried every one of the cell caching mechanisms all the way down to "cache_to_sqlite3" but none of them work.

Can someone tell me what I am doing wrong here?

EDIT: Apparently I skipped over the "cache_to_sqlite" option. I tried that and it started caching. However, it still runs out of memory during the caching process on a 30 MB file with 256MB of memory available. Here is the error:

 Fatal error: Uncaught exception 'Exception' with message 'out of memory' in modules/PHPExcel/CachedObjectStorage/SQLite.php:64 Stack trace: #0 modules/PHPExcel/CachedObjectStorage/SQLite.php(81): PHPExcel_CachedObjectStorage_SQLite->_storeData() #1 modules/PHPExcel/Worksheet.php(1123): PHPExcel_CachedObjectStorage_SQLite->addCacheData('X2498702', Object(PHPExcel_Cell)) #2 modules/PHPExcel/Reader/Excel5.php(3549): PHPExcel_Worksheet->getCell('X2498702') #3 modules/PHPExcel/Reader/Excel5.php(894): PHPExcel_Reader_Excel5->_readLabelSst() #4 modules/updater.inc.php(1478): PHPExcel_Reader_Excel5->load('modules/p...') #5 modules/updater.php(204): Updater->process_xls('prods.xls') #6 {main} thrown in modules/PHPExcel/CachedObjectStorage/SQLite.php on line 64
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1 回答 1

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单元缓存不会消除内存使用：它会减少它。显然，您仍然没有足够的 PHP 内存来处理这么大的工作簿。

一个可能的问题是对单元格“X2498702”的引用... Excel BIFF 文件（由 Excel5 阅读器加载的类型）的上限为 65536 行，因此如果读者尝试加载，这里显然出了问题第 2498702 行中的一个单元格。问题不在于单元格缓存，而是 Excel5 阅读器查找数据被误解，或者该 Excel 文件中不应该存在的数据。

您能否将此特定文件的副本（如果允许保密）上传到 PHPExcel 网站，以便我们查看并尝试确定到底出了什么问题。

于 2012-12-01T17:45:38.677 回答