How can error handling and debugging techniques be applied to troubleshoot PHP file upload issues?

To troubleshoot PHP file upload issues, error handling and debugging techniques can be applied by checking for common errors such as file size limits, file type restrictions, and server configurations. Using functions like `$_FILES['file']['error']` and `move_uploaded_file()` can help identify and resolve upload problems. 

if ($_FILES['file']['error'] !== UPLOAD_ERR_OK) {
    echo "File upload failed with error code: " . $_FILES['file']['error'];
} else {
    $uploadDir = '/path/to/upload/directory/';
    $uploadFile = $uploadDir . basename($_FILES['file']['name']);

    if (move_uploaded_file($_FILES['file']['tmp_name'], $uploadFile)) {
        echo "File successfully uploaded!";
    } else {
        echo "Error uploading file. Please check your server configurations.";
    }
}

Keywords

file upload error handling debugging PHP troubleshooting

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