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$sheetArr = array ();
for($i = 0; $i < count ( $userList ); $i ++) {
//获取用户各科目成绩
$userGrades = $this->getUserGrades ( $userList [$i] ['userId'] );
$sheetData ['data'] = $data;
$sheetData ['class_name'] = $userList [$i] ['class_name'];
$sheetData ['class_id'] = $userList [$i] ['class_id'];
$sheetArr [] = $sheetData;
}
$sheetArr = array ();
for($i = 0; $i < count ( $userList ); $i ++) {
//获取用户各科目成绩
$userGrades = $this->getUserGrades ( $userList [$i] ['userId'] );
$sheetData ['data'] = $userGrades;
$sheetData ['class_name'] = $userList [$i] ['class_name'];
$sheetData ['class_id'] = $userList [$i] ['class_id'];
if(!isset($sheetArr[$sheetData ['class_id']])){
$sheetArr[$sheetData ['class_id']] = array();
}
$sheetArr[$sheetData ['class_id']][] = $sheetData;
}
//最后加上这么一句
$sheet[$sheetData['class_id']][] = sheetData