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The problem is superglobals (post) values are not defined


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I am having trouble with passing values with a POST to another php file.  I am getting the error :  undefined index : productID and undefined index: filename.  I have also tried :  <form   method = \"POST?pdib=$processID&filename=$filename\" action = \"upload2.php\"  >  When I look at the array of superglobals, they are both defined.  Thank you! 

 Here is the code :


$sql = "SELECT ProductFilename, ProductName, ProductID, ProductDescription,ProductCost,ProductQuantity, ProductCatTitle FROM products 
INNER JOIN customers ON customers.CustomerID = products.CustomerID 
WHERE ((products.ProductKeyWord1 = ?) 
OR (products.ProductKeyWord2 = ?) OR (products.ProductKeyWord3 = ? ))  AND (products.ProductCatTitle = ?) ";

$stmt = $dbo->prepare($sql);
$stmt->bindParam(1, $keyword1);
$stmt->bindParam(2, $keyword1);
$stmt->bindParam(3, $keyword1);
$stmt->bindParam(4, $titleOfSelectedDropDown);


while ($row = $stmt->fetch()) {

//these variables do have values here
$productID = $row['ProductID'];
$filename = $row['ProductFilename'];

$string1 .=  "  
<div  class = \"A\" id = \"$mainDiv\">
<p id = \"link1\">product id   :$productID</p>
<p>category id  :$category</p>
<div class = \"A\" id = \"endz\"></div>
<div class = \"A\" id = \"startz\"></div>
<div class=\"container\">
<div id = \"testing\" >testing <div>
<div id = \"$displayID\" >  </div>
<div class=\"row\" >
<div class=\"col\">
	<form   method = \"POST\" action = \"upload2.php\"  >
	<input type=hidden id='$productID' name= '$productID' value=\"A\">
	<input type=hidden id=\"$filename\" name=$filename value=\"B\">
      <button value = \"Submit\" type = \"submit\"  >submit it</button>
	<iframe id=\"upload_target\" name=\"upload_target\"  style=\"width:0;height:0;border:0px solid #fff;\"></iframe> 
	<img width=\"120\" height =\"120\"  id = \"$imageID\"  src=\"../php proj/uploads/$filename?<?php echo filemtime($filename)?>\">
	<button    onclick = \"imageRefresh( '{$filename}', '{$imageID}', '{$_SESSION["msg"]}' )\" >Display</button>


if (!isset($myObj) && isset($string1))
$myObj = new stdClass();
$myObj->htmlstuff = $string1;

//Encode the data as a JSON string
$jsonStr = json_encode($myObj);
echo $jsonStr;


function printHTML1(keyword){ 
	const element = document.getElementById("dropDown1");
	//const checkValue = element.options[element.selectedIndex].value;
	const checkText = element.options[element.selectedIndex].text;
	var val1 = checkText;

	var xmlhttp = new XMLHttpRequest();
	var keyword1 = keyword;
	var url = "drawfirsttwoforms.php?keyword=" + keyword.value + "&" + "val1=" + val1;

	xmlhttp.onreadystatechange = function() {
	if (this.readyState == 4 && this.status == 200) {
		var jsonData = JSON.parse(this.responseText);
		var answerHtml = jsonData.htmlstuff;
		document.getElementById("codehere").innerHTML = answerHtml;


	xmlhttp.open("GET", url , true);



$productID = $_POST['productID'];
$filename = $_POST['filename'];


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10 minutes ago, JoshEir said:

<input type=hidden id='$productID' name= '$productID' value=\"A\">

<input type=hidden id=\"$filename\" name=$filename value=\"B\">

If $productID contains '123' and $filename contains 'abc.txt' then upload2 will receive

  • $_POST['123'] with a value of 'A'
  • $_POST['abc.txt'] with a value of 'B'

It looks like you need

<input type='hidden' name='productID' value='$productID'>
<input type='hidden' name='filename' value='$flename'>


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