php如何讀取excel中的數據

$allColumn = $currentSheet->getHighestColumn(); 
/**取得一共有多少行*/ 
$allRow = $currentSheet->getHighestRow(); 
/**从第二行开始输出，因为excel表中第一行为列名*/

for($currentRow = 2;$currentRow <= 98;$currentRow++){ 
/**从第A列开始输出*/ 
echo"";
//for($currentColumn= 'A';$currentColumn<= $allColumn; $currentColumn++){ 
$cancername="";
for($currentColumn= 'A';$currentColumn<='B'; $currentColumn++){