我正在为我们的大学建立一个时间表。我已经完成了上传.csv文件,它还显示了所有数据。我的问题是,有没有什么办法可以替换我上传新的.csv文件之前上传的整个数据?我的意思是删除/替换旧数据..
这是我上传csv文件的PHP代码。
<?php
$conn = mysql_connect("localhost","root","") or die (mysql_error());
mysql_select_db("testing",$conn);
if(isset($_POST['submit']))
{
$file = $_FILES['file']['tmp_name'];
if($file == "")
{
?>
<script type="text/javascript">
alert('No File Selected!');
</script>
<?php
}
else
{
$handle = fopen($file,"r");
while(($fileop = fgetcsv($handle,1000,",")) !==false)
{
$subj_desc = $fileop[0];
$subj_code = $fileop[1];
$units = $fileop[2];
$day = $fileop[3];
$start_time = $fileop[4];
$end_time = $fileop[5];
$soc = $fileop[6];
$eoc = $fileop[7];
$max = $fileop[8];
$room = $fileop[9];
$term = $fileop[10];
$lecturer = $fileop[11];
$sql = mysql_query("INSERT INTO `tbl_schedule_board` (`subj_desc`,`subj_code`,`units`,`day`,`start_time`,`end_time`,`soc`,`eoc`,`max`,`room`, `term`, `lecturer`)
VALUES (
'" . mysql_real_escape_string($subj_desc) . "',
'" . mysql_real_escape_string($subj_code) . "',
'" . mysql_real_escape_string($units) . "',
'" . mysql_real_escape_string($day) . "',
'" . mysql_real_escape_string($start_time) . "',
'" . mysql_real_escape_string($end_time) . "',
'" . mysql_real_escape_string($soc) . "',
'" . mysql_real_escape_string($eoc) . "',
'" . mysql_real_escape_string($max) . "',
'" . mysql_real_escape_string($room) . "',
'" . mysql_real_escape_string($term) . "',
'" . mysql_real_escape_string($lecturer) . "')");
}
if($sql)
{
echo '<script> alert("Data Successfully Uploaded."); </script>';
}
}
}
&GT;
感谢任何帮助。谢谢!