我有一个网站显示健康测试结果，该结果在Drupal上运行，值存储在mysql数据库中。 oringinal数据来自连接到进行健康测试的人的计算机，然后将其放入excel .xls文件中。
我有一个脚本，允许我将这些.xls文件上传到数据库，这样当我有50-100个测试要添加时，我不必单独完成每个。除了null值之外，它工作得很好。当有空白测试时，它会自动将其设置为0但我希望它设置为空。
对于我而言，null和0之间存在很大差异，因为0表示他们没有得分（例如，无法在卧推时获得所需的重量）与null表示他们没有完成由于诸如伤害或设备不可用等因素而进行的测试。
是否可以区分这两者，以便.xls中的空白单元格在数据库中显示为null而不是0？这是一个代码问题还是数据库问题，我应该尝试将其存储为int或decimal以外的其他东西？
<?php
require_once 'Excel/reader.php';
include('db.php');
global $user;
$useriddd=$user->uid;
$message='';
$userArr=array();
$emailArr=array();
if(isset($_GET['meg']))
{
$message=base64_decode($_GET['meg']);
}
if(isset($_POST['SubmitFile']))
{
$temp_path="Excel/";
if($_FILES['fileexcel']['tmp_name']!="")
{
if($_FILES['fileexcel']['name']=='fitness.xls')
{
$var1=$_FILES['fileexcel']['name'];
move_uploaded_file($_FILES['fileexcel']['tmp_name'],$temp_path.$var1);
$path=$temp_path.$var1;
}
else
{
$var=base64_encode('You are allowed to upload excel file with name fitness.xls only');
?>
<script language="javascript">window.location='<?php echo base_path()?>upload-fitness-results?meg=<?php echo $var;?>'</script>
<?php
exit;
}
}
}
if(isset($_GET['p'])=='do')
{
$data = new Spreadsheet_Excel_Reader();
$data->read('Excel/fitness.xls');
error_reporting(E_ALL ^ E_NOTICE);
for ($j =1; $j <= count($data->sheets[0]['cells']); $j++)
{
$playeridQry=mysql_query("select uid from users where name='".addslashes($data->sheets[0]['cells'][$j][3])."'")or die(mysql_error());
$playeridRow=mysql_fetch_array($playeridQry);
//////////////////////////////////////////////////////////////////////////
$campidQry=mysql_query("select nid from node where type='training_camp' and title='".addslashes($data->sheets[0]['cells'][$j][2])."'")or die(mysql_error());
$campidRow=mysql_fetch_array($campidQry);
/***********************************player content type code***********************************/
$maxqry=mysql_query("select MAX(nid), MAX(vid) from node") or die(mysql_error());
$maxrow=mysql_fetch_array($maxqry);
$newnid=$maxrow['MAX(nid)']+1;
$newvid=$maxrow['MAX(vid)']+1;
///////////////////////////for node entry///////////////////////
$nodeinsertqry="insert into node
set
vid='".$newvid."',
nid='".$newnid."',
type='test',
title='".addslashes($data->sheets[0]['cells'][$j][1])."',
uid='".$useriddd."',
created='".time()."',
changed='".time()."',
status='1'";
mysql_query($nodeinsertqry) or die(mysql_error());
$nodnewid=mysql_insert_id();
//////////////////////////////for url_alias//////////////////
$srcc='node/'.$newnid;
$pathC=str_replace(' ','-',$data->sheets[0]['cells'][$j][1]);
$dsts='content/'.$pathC;
$insertAlias=mysql_query("insert into url_alias
set
src='".$srcc."',
dst='".$dsts."'");
////////////////revision table//////////////
$revisioninsertqry="insert into node_revisions
set
vid='".$newvid."',
nid='".$newnid."',
title='".addslashes($data->sheets[0]['cells'][$j][1])."',
uid='".$useriddd."',
format='3',
timestamp='".time()."'";
mysql_query($revisioninsertqry) or die(mysql_error());
////////////////////player content type/////////////////
$playerQry=mysql_query("insert into content_type_test set
vid='".$newvid."',
nid='".$newnid."',
field_player_uid='".$playeridRow['uid']."',
field_status_value='".addslashes($data->sheets[0]['cells'][$j][4])."',
field_training_camp_nid='".$campidRow['nid']."',
field_speed_value='".addslashes($data->sheets[0]['cells'][$j][6])."',
field_agility_value='".addslashes($data->sheets[0]['cells'][$j][7])."',
field_trx_value='".addslashes($data->sheets[0]['cells'][$j][5])."',
field_squats_value='".addslashes($data->sheets[0]['cells'][$j][8])."',
field_balance_value='".addslashes($data->sheets[0]['cells'][$j][11])."',
field_bench_value='".addslashes($data->sheets[0]['cells'][$j][10])."',
field_beep_value='".addslashes($data->sheets[0]['cells'][$j][14])."',
field_sprint__do_value='".addslashes($data->sheets[0]['cells'][$j][12])."',
field_hrdropvv_value='".addslashes($data->sheets[0]['cells'][$j][13])."',
field_chins_value='".addslashes($data->sheets[0]['cells'][$j][9])."',
field_elasticity_value='".addslashes($data->sheets[0]['cells'][$j][15])."'
")or die(mysql_error());
/********************End of player content type*************************/
}
unlink('Excel/fitness.xls');
$message=base64_encode('Data has been populated into data base and file has been deleted from the server');
?>
<script language="javascript">window.location='<?php echo base_path()?>upload-fitness-results?meg=<?php echo $message;?>'</script>
<?php
exit;
}
if(file_exists('Excel/fitness.xls'))
{
echo "fitness.xls is available....";
?>
<a href="<?php echo base_path()?>upload-fitness-results?p=do">Please Populate the file into database</a>
<?php
}
if(!file_exists('Excel/fitness.xls'))
{
?>
<form action="" method="post" enctype="multipart/form-data" name="excel" id="excel" >
<table style="width:700px; border:#CCCCCC solid 1px;" cellpadding="1" cellspacing="1">
<tr>
<td colspan="2" style="color:#FF0000;">
<?php
if(isset($message))
{
echo $message;
}
?>
</td>
</tr>
<tr>
<td width="34%" class="subjects">Choose File(fitness.xls) </td>
<td width="66%"><label>
<input name="fileexcel" type="file" id="fileexcel" />
</label></td>
</tr>
<tr>
<td> </td>
<td> </td>
</tr>
<tr>
<td> </td><td><label>
<input name="SubmitFile" type="submit" class="buttons" id="SubmitFile" value="Upload" />
</label></td>
</tr>
</table>
</form>
<?php
}
?>