What role do folder permissions play in the successful execution of PHP file upload scripts?

Folder permissions play a crucial role in the successful execution of PHP file upload scripts because the folder where the uploaded files are stored needs to have the correct permissions set in order for PHP to write to it. If the folder permissions are not set correctly, PHP may not be able to save the uploaded files to the designated folder, resulting in errors or failed uploads. To solve this issue, you need to ensure that the folder where the files are being uploaded has the correct write permissions set.

// Set the correct folder permissions for file uploads
$upload_folder = 'uploads/';

// Check if the upload folder exists, if not create it
if (!file_exists($upload_folder)) {
    mkdir($upload_folder, 0777, true);
}

// Set the correct permissions for the upload folder
chmod($upload_folder, 0777);