able to keep current uploaded file name on image - php

Question

I have been trying for like 2 days now and its been frustrating! so hopefully i will learn something new today :)
Right, i have a php page where i can upload up to 3 images, the code is in a table (shrinked down to show only image inputs)
<tr>
<td align="right">1st Image</td>
<td><label>
<input type="file" name="fileField1" id="fileField1"/>
</label></td>
</tr>
<tr>
<td align="right">2nd Image</td>
<td><label>
<input type="file" name="fileField2" id="fileField2" />
</label></td>
</tr>
<tr>
<td align="right">3rd Image</td>
<td><label>
<input type="file" name="fileField3" id="fileField3" />
</label></td>
the feilds are then stored in a upload slot via php -
if (isset($_FILES['fileField1'])) {
$errors = array();
$allowed_ext = array('jpg', 'jpeg', 'png', 'gif');
$file_name = $_FILES['fileField1']['name'];
$global_file_name1 .= $file_name;
$file_ext = strtolower(end(explode('.', $file_name)));
$file_size = $_FILES['fileField1']['size'];
$file_tmp = $_FILES['fileField1']['tmp_name'];
if (in_array($file_ext, $allowed_ext) === false) {
$errors[] = 'Extention not alowed';
}
if ($file_size > 2097152) {
$errors[] = 'File must be under 2MB';
}
if (empty($errors)) {
move_uploaded_file($file_tmp, 'upload/'.$file_name);
} else {
foreach ($errors as $error) {
echo $error, '<br />';
}
}
Code is same for all 3
My problem is on the edit pages where you can change the other feilds (like name, details etc) when you then press submit the name is then changed to nothing as after a submit it submits what it has got which is nothing as the image hasnt been changed and was left.
My question is can i find a way of stopping the image if statement from going if nothing has been selected?
Thanks in advance!

Answer 1

You can check the file size:
if ($_FILES['fileField1']['size']>0) {
// new file has been submitted. Process it.
} else {
// an empty field has been submitted. Do nothing.
}