Array to string conversion in PHP - php

Question

This is probably a simple question but I cannot figure it out alone.
I want the column of the table to hold the part key as href to another page that does something. Without the href it works fine.
echo "<table border='1' style='width:300px'>";
echo "<tr>
<th>KEY</th>
<th>NAME</th>
<th>MFGR</th>
<th>BRAND</th>
<th>TYPE</th>
<th>SIZE</th>
<th>CONTAINER</th>
<th>RETAIL PRICE</th>
<th>COMMENT</th>
</tr>";
while($array=mysqli_fetch_array($result))
{
echo "<tr>";
//The following line gives me "Notice: Array to string conversion":
echo "<td> ".$array[0]. "</td>";
echo "<td> ".$array[1]. "</td>";
echo "<td> ".$array[2]. "</td>";
echo "<td> ".$array[3]. "</td>";
echo "<td> ".$array[4]. "</td>";
echo "<td> ".$array[5]. "</td>";
echo "<td> ".$array[6]. "</td>";
echo "<td> ".$array[7]. "</td>";
echo "<td> ".$array[8]. "</td>";
echo "</tr>";
}
echo "</table>";
The line that gives me trouble is the one with the href as I mentioned.

Answer 1

Apart from $nKey not being defined anywhere, you have problems on this line:
echo "<td> ".$array[0]. "</td>";
// ^
That's not where the href ends. You need to move this to where it actually ends:
echo "<td><a href='part.php?item_n= ".$array[0]."&key= ".$nkey."'> ".$array[0]. "</a></td>";
// ^
Edit:
Your real problem is that $nkey is an array, and not a string as you're expecting. Since this variable has been left out of the posted script it's hard to give any further suggestions until it's seen.

Answer 2

".$array[0]. "
^
This single quote is misplaced, place it after the whole address,
<a href='part.php?item_n= ".$array[0]."&key= ".$nkey."'> ".$array[0]. "</a>
^ here

Answer 3

Try this,
echo "<td><a href='part.php?item_n=".$array[0]."&key=".$nkey."'>".$array[0]. "</a></td>";
OR
echo "<td><a href='part.php?item_n=$array[0]&key=$nkey'>".$array[0]. "</a></td>";