What are some common errors that can occur when using PHP to check directory permissions?

One common error when checking directory permissions in PHP is not using the correct file path or directory name, which can lead to incorrect results. To solve this issue, make sure to provide the correct path to the directory you want to check permissions for. Another error can occur if the PHP script does not have the necessary permissions to access the directory, resulting in a permission denied error. To fix this, ensure that the PHP script has the appropriate permissions to access the directory.

// Check directory permissions
$directory = '/path/to/directory';

if (is_dir($directory)) {
    if (is_readable($directory)) {
        echo "Directory is readable.";
    } else {
        echo "Directory is not readable.";
    }

    if (is_writable($directory)) {
        echo "Directory is writable.";
    } else {
        echo "Directory is not writable.";
    }
} else {
    echo "Directory does not exist.";
}