Unexpected result after file upload - php

Question

This code is to update database. it updates everything even uploads image sucessfully but after image upload the whole page gets blank and only "Array()" is displayed at top. Why is that?
<?php
if(!isset($_GET["prid"])){
header("Location: prjedit.php");
}
else {
$prid = intval($_GET["prid"]);
$sqlprj = "SELECT * FROM projects WHERE id = ? LIMIT 1";
$statement = $db->prepare($sqlprj);
$statement->execute(array($prid));
$project = $statement->fetchObject();
//submitted form
if( (isset($_POST["title"])) && (isset($_POST["details"])) ) {
$title = $_POST['title'];
$desc = $_POST['descr'];
$details = $_POST['details'];
if(!empty($_FILES['image']['name'])) {
//update image
$file = basename($_FILES['image']['name']);
$dir = "projects/";
$target_path = $dir . basename($_FILES['image']['name']);
$tempname = $_FILES['image']['tmp_name'];
if(!file_exists($target_path)) {
if(move_uploaded_file($tempname, $target_path)) {
$sqlimg = "UPDATE projects SET image = ? WHERE id = ?";
$statement = $db->prepare($sqlimg);
$statement->execute(array($file, $prid));
if($statement->rowCount() > 0) {
try {
chdir('./projects/');
unlink($project->image);
chdir('..');
}
catch (Exception $e) {
$message = "Sorry image delete failed ";
echo $e->getMessage();
}
}
else {
die ($db->errorInfo());
}
}
else {
$message = "Sorry Image update failed";
}
}
else {
$message = "Sorry this image already exists but text";
}
}
// update project texts
$sqlupd = "UPDATE projects SET title = ?, descinfo = ?, details = ? WHERE id = ?";
$statement = $db->prepare($sqlupd);
$statement->execute(array($title, $desc, $details, $prid));
if($statement->rowCount()) {
$message = " Saved successfully";
}
else {
die($db->errorInfo());
}
}
}
?>

Answer 1

Looking at Pdo::codeInfo documentation, it returns an array.
When you write die($db->errorInfo()); it will try to display this array.
As suggested by the documentation itself, you could try print_r($db->errorInfo()); die; and see what happens.