Blank screen when updating data in php table - php

Question

I have been working on a project and i am at the final stages of the project. My problem is whenever i try to update data in my database table into returns a blank screen with no error messages. Please find the php script and html form (the form responsible for updating the database table) below, i have divided it into about four sections:
Thanks in advance
Update Form:
<a name="inventoryEditForm" id="inventoryEditForm"></a>
<h3>↓Add New Question Form↓</h3>
<form action="inventory_edit.php" enctype="multipart/from-data" name="myForm" id="myForm" method="post">
<table width="80%" border="0" cellspacing="3" cellpadding="7">
<tr>
<td width="20%"> </td>
<td width="80%"> </td>
</tr>
<tr>
<td>Question</td>
<td><textarea rows="" name="question" cols=""><?php echo $question; ?></textarea></td>
</tr>
<tr>
<td> </td>
</tr>
<tr>
<td>Venue</td>
<td><input type="text" name="venue" maxlength="50" value="<?php echo $venue; ?>"></td>
</tr>
<tr>
<td> </td>
</tr>
<tr>
<td>Date</td>
<td><input type="date" name="questiondate" value="<?php echo $date; ?>"></td>
</tr>
</table>
<br>
<input name="thisID" type="hidden" value="<?php echo $targetID; ?>"/>
<input type="submit" name="submit" value="Update Question">
<input type="reset" name="clear" value="Clear Form">
</form>
PHP Script:
<?php
//Error reporting due to long script
error_reporting(E_ALL);
ini_set('display_errors', '1');
?>
<?php
error_reporting(E_PARSE);
//Update question table
If (isset($_POST['question'])) {
$id = mysqli_real_escape_string($link, $_POST['thisID']);
$question = mysqli_real_escape_string($link, $_POST['question']);
$venue = mysqli_real_escape_string($link, $_POST['venue']);
$date = mysqli_real_escape_string($link, $_POST['questiondate']);
//Update question in the table
$sql = mysqli_query($link, "UPDATE DebateQuestion SET question='$question',venue='$venue',date='$date' WHERE qQuestionNo='$id'LIMIT 1") or die(mysql_error());
header("location: inventory.php");
exit();
}
?>
<?php
error_reporting(E_PARSE);
//Gather this questions full information and insert automatically into the edit form
if (isset($_GET['qid'])) {
$targetID = $_GET['qid'];
$sql = mysqli_query($link, "SELECT * FROM DebateQuestion WHERE qQuestionNo='$targetID'LIMIT 1") or die(mysql_error());
$questionCount = mysqli_num_rows($sql); // count the output amount
if ($questionCount > 0) {
while ($row = mysqli_fetch_array($sql, MYSQLI_ASSOC)) {
$id = $row["qQuestionNo"];
$question = $row["qQuestion"];
$venue = $row["qDebateVenue"];
$date = strftime("%b %d, %Y", strtotime($row["qDate"]));
}
} else {
echo "Oops, no questions like that exists. Check <a href='inventory.php'>inventory</a>again";
exit();
}
}
?>

Answer 1

In your update query you have the data column without using ` back ticks , date is also a mysql's function try to wrap up your column names with back ticks if you are not sure whether they conflict with mysql's reserved keywords
$sql = mysqli_query($link,"UPDATE DebateQuestion SET
`question`='$question',`venue`='$venue',`date`='$date'
WHERE qQuestionNo='$id'LIMIT 1")

Answer 2

"SELECT * FROM DebateQuestion WHERE qQuestionNo='$targetID'LIMIT 1"
Here is qQuestionNo column a string type?if not remove quotes around $targetID.

Answer 3

Note : I have not tested the code - just read it on screen.
I've never seen an IF statement capitalized before :
If (isset($_POST['question'])) {
I'd guess this makes a difference however.
There's lots of other weird things going on in your files, but none that should give you white screen. Try lowercase 'I' in your if statement first.
ALSO - re: the UPDATE statement, you are missing a space between the $id and the LIMIT :
**qQuestionNo='$id'LIMIT 1**