PHP file upload error conditions - php

Question

I am trying to create a profile editing setup. It seems as though the information is edited only when an image is being uploaded. I found out that allowing the error message to be a condition allows for some more manipulation so I attempted it now my condition statement is not working as it should.
if($_FILES['files']['error']==0) {
print_r($_FILES['files']['error']);
echo "if";
foreach($_FILES['files']['name'] as $file => $name) {
$filename = $name;
try{
if(move_uploaded_file($_FILES['files']['tmp_name'][$file],'uploads/'.$filename)) {
$updateInfo = $db->prepare("UPDATE users SET image = :image, aboutme = :aboutme WHERE id = :id");
$updateInfo->bindParam(":image", $filename);
$updateInfo->bindParam(":id", $_SESSION['user']['id']);
$updateInfo->bindParam(':aboutme', $aboutme);
$updateInfo->execute();
}
} catch(Exception $e) {
echo $e;
}
}
} elseif($_FILES['files']['error'] == 4) {
print_r($_FILES['files']['error']);
echo "Elseif";
try{
$updateInfo = $db->prepare("
UPDATE users
SET
aboutme = :aboutme
WHERE id = :id
");
$updateInfo->bindParam(':id', $_SESSION['user']['id']);
$updateInfo->bindParam(':aboutme', $aboutme);
$updateInfo->execute();
} catch(Exception $e) {
echo $e;
}
} else{
print_r($_FILES['files']['error']);
echo "else";
}
}
When I check what array is being sent, its the correct one but the wrong condition, ie: it would run the else statement no matter the file check.
My question:
Is there something wrong with my code, with the exception of any security or efficiency flaws?

Answer 1

$_FILES['files']['error'] returns error code along with the file array. There are different type of error codes, all codes are mentioned in following link with details:
Please check by
print_r($_FILES['files'])
and see what are you getting in response.
As you posted your array response, you can get error code by $_FILES['files']['error'][0] or use switch case as mentioned in following link.
See here for more details:
http://php.net/manual/en/features.file-upload.errors.php
Also regarding debugging, always debug code step by step from top to bottom. Check $_POST, $_FILES, $_SERVER etc details if you get some problem particular related to data process.