Question

我是所有专家我是php的新手。任何人都可以告诉我加快PHPExcel这是我的代码，它读取20000行4列。它需要超过15秒。非常感谢你

function upload_fl($FILES){

$file = $FILES['excel'];

//echo getcwd();
//print_r($file);

require 'phpexcel/PHPExcel.php';

if(move_uploaded_file($file['tmp_name'],'C:/wamp/www/datatable_017/php/upload/'.$file['name'])){

    $data = '../php/upload/'.$file['name'];

    $objPHPExcel = PHPExcel_IOFactory::load($data);
    $sheetData = $objPHPExcel->getActiveSheet()->toArray(null,true,true,true);

    //var_dump($sheetData);

    echo sizeof($sheetData);
    //$writefile = fopen($FILES['excel']['name'].'.txt','w');
    /*
    foreach($sheetData as $row){
        foreach($row as $col->$value){
            //$value_inser = (is_numeric($value) == true ? ''number',''.$value.'',''':''text','',''.$value.''');
            //fwrite($writefile,$cate_set_id[$col].','.$com_id.','.$year.','.$value_insert.'\n');
        }
    }
    -->
    fclose($writefile);
    */
    return 'upload/'.$file['name'].'.txt';
}else{
    return 'upload failed';
}
}//function

Answer 1

如果您有多个工作表，但不需要加载所有工作表，则可以使用setLoadSheetsOnly（）方法限制Reader将加载的工作表。要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);

或者您可以通过传递一组名称来指定几个工作表，其中一次调用setLoadSheetsOnly（）：

$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);

如果您只需要访问工作表的一部分，那么您可以定义一个读取过滤器来识别您实际想要加载的单元格：

$inputFileType = 'Excel5'; 
$inputFileName = './sampleData/example1.xls';
$sheetname = 'Data Sheet #3'; 

/**  Define a Read Filter class implementing PHPExcel_Reader_IReadFilter  */ 
class MyReadFilter implements PHPExcel_Reader_IReadFilter {
    public function readCell($column, $row, $worksheetName = '') {
        //  Read rows 1 to 7 and columns A to E only 
        if ($row >= 1 && $row <= 7) {
           if (in_array($column,range('A','E'))) { 
              return true;
           }
        } 
        return false;
    }
}

/**  Create an Instance of our Read Filter  **/ 
$filterSubset = new MyReadFilter(); 
/** 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 
     It's more efficient to limit sheet loading in this manner rather than coding it into a Read Filter  **/ 
$objReader->setLoadSheetsOnly($sheetname); 
echo 'Loading Sheet using filter';
/**  Tell the Reader that we want to use the Read Filter that we've Instantiated  **/ 
$objReader->setReadFilter($filterSubset); 
/**  Load only the rows and columns that match our filter from $inputFileName to a PHPExcel Object  **/
$objPHPExcel = $objReader->load($inputFileName);

如果您不需要加载格式化信息，只需加载工作表数据，那么setReadDataOnly（）方法将告诉读者仅加载单元格值，忽略任何单元格格式：

$inputFileType = 'Excel5';
$inputFileName = './sampleData/example1.xls';
/** Create a new Reader of the type defined in $inputFileType **/ 
$objReader = PHPExcel_IOFactory::createReader($inputFileType);
/** Advise the Reader that we only want to load cell data, not formatting **/ 
$objReader->setReadDataOnly(true);
/**  Load $inputFileName to a PHPExcel Object  **/
$objPHPExcel = $objReader->load($inputFileName);

虽然请注意，只读取这样的原始数据不允许您区分日期值和浮点数

如果您想使用大型Excel文件，请不要通过进行toArray()调用在内存中构建大型PHP数组，因为这是内存使用量的一大开销，并且性能也会很高在构建数组时不断需要分配越来越多的内存......如果你要一次处理一行，使用PHPExcel中内置的迭代器，或者只使用一个循环来访问每一行反过来。

如何加速PHPExcel阅读器

1 个答案: