删除文档并更新数据库

I have 2 files that assist me in removing the document and updating the database. My first file consists of 1 form with a remove button and a javascript function called remove(). Second php page would be removing the file which it does not return any results.

Code for Remove.php (Upon calling out remove() function):

$Doc=$_GET['Doc']; //Value get from remove() function
$ID= intval($_POST['ID']);
$FirstReport= $_POST['FirstReport'];
$SecReport = $_POST['SecReport'];

$FirstReportPath= $_POST['FirstReportPath'];
$SecReportPath = $_POST['SecReportPath '];

$DB = new PDO('sqlite:/database/Student.db');
//If i click remove firstreport button, i'll check it to see if it's the same
if(($Doc) == ($FirstReport))
{
   $result= $DB->query("Update Student set FirstReport='No' WHERE ID=".$ID);    
//This unlink should remove the document file from the path.
    unlink($FirstReportPath);
echo "success";
 }
 else
 {
    //same code repeated as if statement
 }

Javascript function

 function RemoveDoc(Doc)
 {
 xmlhttp=new XMLHttpRequest();
 xmlhttp.open("GET","functions/Resubmit.php?Doc="+Doc,true);
 xmlhttp.send();
 document.getElementById("RemoveMsg").innerHTML=xmlhttp.responseText;
 return false;
 }

I did try to alert(Doc) out and the document name does show but on the second remove.php, it does not run any of the coding. Tried "GET"/"POST" also the same results. Kindly advise.

You have to send the values ad post to access from $_POST superglobal. Just modify the Javascript code

function RemoveDoc(Doc,FirstReport,SecReport,FirstReportPath,SecReportPath)
{
 xmlhttp=new XMLHttpRequest();
 xmlhttp.open("POST","functions/Resubmit.php",true);
 xmlhttp.onreadystatechange=function(){
   if (xmlhttp.readyState==4 && xmlhttp.status==200)
      document.getElementById("RemoveMsg").innerHTML=xmlhttp.responseText;
 }
 xmlhttp.send("Doc="+Doc+"&FirstReport="+FirstReport+"&SecReport="+SecReport);
 //do for others also in the same way
 return false;
}

It looks like your sending a post request, but sending your document name in the url, a $GET variable.

either switch to a get request:

function RemoveDoc(Doc)
 {
 xmlhttp=new XMLHttpRequest();
 xmlhttp.open("GET","functions/Resubmit.php?Doc="+Doc,true);
 xmlhttp.send();
 document.getElementById("RemoveMsg").innerHTML=xmlhttp.responseText;
 return false;
 }

or send the document name as a post parameter:

function RemoveDoc(Doc)
 {
 xmlhttp=new XMLHttpRequest();
 xmlhttp.open("POST","functions/Resubmit.php",true);
 xmlhttp.send("Doc="+Doc);
 document.getElementById("RemoveMsg").innerHTML=xmlhttp.responseText;
 return false;
 }

Also, your not waiting for a response from the server.

function RemoveDoc(Doc)
{
xmlhttp=new XMLHttpRequest();
xmlhttp.open("POST","functions/Resubmit.php",true);
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("RemoveMsg").innerHTML=xmlhttp.responseText;
    }
  }
 xmlhttp.send('Doc='+Doc);
return false;
}