php - 如何在 block 循环中使用 PHPExcel 库确定文件的结尾？

Question

使用 PHPExcel 库，我试图迭代大约 1500 行，每行大约有 25 列。

我正在使用这段代码(取自 PHPExcel runs out of 256, 512 and also 1024MB of RAM ):

/**  Create a new Reader of the type defined in $inputFileType  **/
$objReader = PHPExcel_IOFactory::createReader($inputFileType);
/**  Define how many rows we want to read for each "chunk"  **/ 
$chunkSize = 20;
/**  Create a new Instance of our Read Filter  **/ 
$chunkFilter = new chunkReadFilter(); 
/**  Tell the Reader that we want to use the Read Filter that we've Instantiated  **/ 
$objReader->setReadFilter($chunkFilter); 

/**  Loop to read our worksheet in "chunk size" blocks  **/ 
/**  $startRow is set to 2 initially because we always read the headings in row #1  **/
for ($startRow = 2; $startRow <= 65536; $startRow += $chunkSize) { 
    /**  Tell the Read Filter, the limits on which rows we want to read this iteration        **/ 
$chunkFilter->setRows($startRow,$chunkSize); 
/**  Load only the rows that match our filter from $inputFileName to a PHPExcel Object  **/ 
$objPHPExcel = $objReader->load($inputFileName); 
//    Do some processing here 

//    Free up some of the memory 
$objPHPExcel->disconnectWorksheets(); 
unset($objPHPExcel); 

我想处理尽可能多的行有数据。我尝试使用 Worksheet 对象中的 getHighestRow() 方法，但它一直返回 A1

我还尝试通过编写这个小函数来检查下一个检索到的行是否为空:

function _emptyRow($row) {
    $empty=true;

    foreach($row as $r) {
    if ($r!='') {
        $empty = false;
        }
    }

    return $empty;

}

所以如果 _emptyRow() 我将 break 跳出循环。这对我不起作用。

谁能建议一种只检索所有有数据的记录的方法？当我运行它时，即使只有大约 1500 行有数据，它也会在超时前达到大约 23000(使用 set_time_limit(240))；

Answer 1

我通常会这样做:

$objPHPExcel = $objReader->load($inputFileName);    
$rows = count($objPHPExcel->getActiveSheet()->toArray());    
for ($start_row = 1; $start_row < $rows; $start_row ++)
// ...

$excel->getActiveSheet()->toArray() 将只返回数组中的每一行(含数据)。