How can the issue of not being able to view uploaded images on Coppermine Photo Gallery be troubleshooted effectively in a PHP environment?

Issue: The problem of not being able to view uploaded images on Coppermine Photo Gallery in a PHP environment can be effectively troubleshooted by checking the file permissions of the uploaded images. Make sure that the files have the correct permissions set to allow the web server to access and display them.

// Check and set correct file permissions for uploaded images
$directory = "path/to/uploaded/images";
$files = scandir($directory);

foreach($files as $file){
    if(is_file($directory . "/" . $file)){
        chmod($directory . "/" . $file, 0644);
    }
}