How can you navigate back to a previous folder in PHP when displaying folder contents?

When displaying folder contents in PHP, you can navigate back to a previous folder by using the `dirname()` function to get the parent directory path of the current directory. This allows you to create a link or button that redirects the user to the parent directory. 

$currentDirectory = $_SERVER['REQUEST_URI'];
$parentDirectory = dirname($currentDirectory);
echo '<a href="' . $parentDirectory . '">Back to Previous Folder</a>';

Keywords

chdir getcwd realpath scandir file system

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