PHP select from tbl / fetch array issue - php

Question

Im having an issue with fetch_array. I keep getting the return of record not found. With every thing that I have looked at it seems to me that this code should work. Sorry im new to php web development.
$JobNumber = NULL;
if($_SERVER['REQUEST_METHOD'] == "POST")
{
$JobID = $_POST['jobid'];
include('pmconnect.php');
$sql="SELECT * FROM tblJobMaster WHERE JobNumber=" . $JobID;
$result=$conn->query($sql);
if ($result->num_rows==0)
{
echo "Record not found.<br>";
die(0);
}
$row=$result->fetch_array();
echo '<table style="text-align: left; width: 100%;" border="1" cellpadding="2" cellspacing="2">';
echo "<tbody>";
echo "<tr>";
echo '<td style="vertical-align: top; text-align: right;">Job Number:<br>';
echo "</td>";
echo '<td style="vertical-align: top;">' .$row[0] . '<br>';
echo "</td>";
echo '<td style="vertical-align: top; text-align: right;">Engineer:<br>';
echo '</td>';
echo '<td style="vertical-align: top;">' . $row[3] .'<br>';
echo '</td>';
echo "</tr>";
echo "<form action=pmAssignEngineer2.php method=post id=usrform>";
echo "<input type=hidden name=JobID value=" . $JobID . ">";
echo "<input type=submit value=\"Update\" name=lookup>";
echo "</td>";
echo "</tr>";
echo "</form>";
echo "</tbody>";
}
else
{
echo "<form action=pmAssignEngineer.php method=post>";
echo "<table border=2>";
echo "<tr>";
echo "<td>Job Number:</td>";
echo "<td><input type=text name=JobID></td>";
echo "</tr>";
echo "</table>";
echo "<input type=submit value=\"Lookup\" name=lookupQ><br>";
echo "</form>";
}

Answer 1

HTML elements are posted to $_POST if form method is post.
The element name is key and value is array value.
And the keys are case-sensitive.
In your case, your element has name JobID and you are referring jobid.
Obviously, the keys of $_POST do not match as jobid and JobID are different.
<input type=text name=JobID>
So, update the following line:
$JobID = $_POST['jobid'];
To
$JobID = $_POST['JobID'];