How to use PHP to read the contents of excel files and obtain cell data

<?php
/*读取excel文件，并进行相应处理*/
$fileName = "url.xls";
if (!file_exists($fileName)) {
    exit("文件".$fileName."不存在");
}
$startTime = time(); //返回当前时间的Unix 时间戳
require_once &#39;./PHPExcel/IOFactory.php&#39;;
$objPHPExcel = PHPExcel_IOFactory::load($fileName);
//获取sheet表格数目
$sheetCount = $objPHPExcel->getSheetCount();
//默认选中sheet0表
$sheetSelected = 0;$objPHPExcel->setActiveSheetIndex($sheetSelected);
//获取表格行数
$rowCount = $objPHPExcel->getActiveSheet()->getHighestRow();
//获取表格列数
$columnCount = $objPHPExcel->getActiveSheet()->getHighestColumn();
echo "<div>Sheet Count : ".$sheetCount."　　行数： ".$rowCount."　　列数：".$columnCount."</div>";
$dataArr = array();

/* 循环读取每个单元格的数据 */
//行数循环
for ($row = 1; $row <= $rowCount; $row++){
//列数循环 , 列数是以A列开始
for ($column = &#39;A&#39;; $column <= $columnCount; $column++) {
    $dataArr[] = $objPHPExcel->getActiveSheet()->getCell($column.$row)->getValue();
    echo $column.$row.":".$objPHPExcel->getActiveSheet()->getCell($column.$row)->getValue()."<br />";
}
echo "<br/>消耗的内存为：".(memory_get_peak_usage(true) / 1024 / 1024)."M";
$endTime = time();
echo "<div>解析完后，当前的时间为：".date("Y-m-d H:i:s")."　　　
总共消耗的时间为：".(($endTime - $startTime))."秒</div>";
var_dump($dataArr);
$dataArr = NULL;}