What is the best way to determine file names in a directory using PHP?

To determine file names in a directory using PHP, you can use the `scandir()` function. This function returns an array of all files and directories in the specified directory. You can then loop through this array to access each file name.

$directory = "path/to/directory";
$files = scandir($directory);

foreach($files as $file){
    if($file != "." && $file != ".."){
        echo $file . "<br>";
    }
}