Submit button not transfering data

PHP
,
1

Hello everyone, I started this week with php and I’m currently working on a php file which transfers data into an mysql-table. However, I can’t get it to work.

PHP

<html>
<head>
<title>IT Battenberg</title>
<link rel="stylesheet" href="style.php" media="screen">
</head>
<body>
<header>
   <div class="navbar">
	   <a href="index.html">Home</a>
	   <div class="dropdown">
		   <button class="drpbtn">Lernmaterial
			   <i class="fa fa-caret-down"></i>
		   </button>
		   <div class="dropdown-content">
			 <a href="#">Link 1</a>
			 <a href="#">Link 2</a>
			 <a href="#">Link 3</a>
		   </div>
	   </div>
	   <a href="process_form.php">Aufträge</a>
	   <div class="dropdown">
		   <button class="drpbtn">NAS
			   <i class="fa fa-caret-down"></i>
		   </button>
		   <div class="dropdown-content">
			 <a href="#">Link 1</a>
			 <a href="#">Link 2</a>
			 <a href="#">Link 3</a>
		   </div>
	   </div>
	   <div class="dropdown">
		   <button class="drpbtn">Über uns
			   <i class="fa fa-caret-down"></i>
		   </button>
		   <div class="dropdown-content">
			 <a href="#">Link 1</a>
			 <a href="#">Link 2</a>
			 <a href="#">Link 3</a>
		   </div>
	   </div>
   </div>
</header>	
	
	
<?php
$host="localhost"; // Host name
$username="root"; // Mysql username
$password="root"; // Mysql password
$db_name="horst"; // Database name
$tbl_name="vollhorst"; // Table name
// Connect to server and select databse.
$link = mysqli_connect("$host", "$username", "$password", "$db_name")or die("cannot connect");
$sql="SELECT id, name, auftrag, bemerkungen FROM $tbl_name";
$result=mysqli_query($link, $sql);
// Count table rows
$count=mysqli_num_rows($result);
?>
<table id="tbl">
<form name="form1" method="post" action="">
<tr class="row">
<td>
<table width="500" border="0" cellspacing="1" cellpadding="0">
<tr class="row">
<td align="center"><strong>Id</strong></td>
<td align="center"><strong>Name</strong></td>
<td align="center"><strong>Auftrag</strong></td>
<td align="center"><strong>Bemerkungen</strong></td>
</tr>
<?php
while($rows=mysqli_fetch_array($result)){
?>
<tr class="row">
<td align="center">
<?php $id[]=$rows['id']; ?><?php echo $rows['id']; ?>
</td>
<td align="center">
<input name="name[]" type="text" id="name" value="<?php echo $rows['name']; ?>">
</td>
<td align="center">
<input name="auftrag[]" type="text" id="auftrag" value="<?php echo $rows['auftrag']; ?>">
</td>
<td align="center">
<input name="bemerkungen[]" type="text" id="bemerkungen" value="<?php echo $rows['bemerkungen']; ?>">
</td>
</tr>
<?php
}
?>
<tr class="row">
<td colspan="4" align="center"><input id="sbt" type="submit" name="Submit"></td>
</tr>
</table>
</td>
</tr>
</form>
</table>
<?php
$name = isset($_POST['name']);
$auftrag = isset($_POST['auftrag']);
$bemerkungen = isset($_POST['bemerkungen']);
if(isset($_POST['Submit'])){
for($i=0;$i<$count;$i++){
$sql1="UPDATE $tbl_name SET name='$name[$i]', auftrag='$auftrag[$i]', bemerkungen='$bemerkungen[$i]' WHERE id='$id[$i]'";
$result1=mysqli_query($link, $sql1);
}
}
mysqli_close($link);
?> 
<input id="rfh" type="button" onclick="window.location.reload()" value="Refresh" />
</body>
	
</html>

Does someone know why. Google didn’t help me.

PS: I know the code above does not protect from sql-injection. It’ merely about a simple example file.

3

What happens? Precisely what do you mean by “can’t get it to work”?

I’d normally expect the processing code to be in before the form is drawn, or in a separate PHP file, but I’m not sure either is essential. This bit, though

$name = isset($_POST['name']);
$auftrag = isset($_POST['auftrag']);
$bemerkungen = isset($_POST['bemerkungen']);

will surely just return true or false for each? You seem to be using the result as arrays for your query.

2 Likes
4

Thank you, it was exactly the part of the code that prevented the form from functioning. I simply removed the isset().
Now I feel a bit stupid. :joy:

5

No need, you should check that form variables exist before you use them, so as to not get errors in your query. Just not like that :slight_smile:

1 Like
6

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