PHP csv文件导入数据

$file=$_FILES['file'];
$fileName=$file['tmp_name'];
if (!$files = fopen($fileName, 'r')) {
    echo "文件读取失败";
    exit;
}
$data = [];
fgetcsv($files); // skip table head
while (!feof($files)) {
    $line = fgetcsv($files);
    if (is_array($line)){
        foreach ($line as $key => $value){
            $encode = mb_detect_encoding($value, array('UTF-8','GB2312','GBK'));
            if ($encode != 'UTF-8'){
                $line[$key] = iconv('gb2312', 'utf-8', $value);
            }else{
                $line[$key] = $value;
            }
        }
        $data[] = $line;
    }
}
if (empty($data)) {
    echo "文件内容为空";
    exit;
}
 
// TODO $data 为导入后的数据，可做业务处理