This code checks if magic quotes are enabled, and if so, strips slashes from GET, POST and COOKIE arrays. It's fully recursive, and thus supports POST arrays.

<?php

// If magic quotes are enabled, strip slashes from all user data
function stripslashes_recursive($var) {
	return (is_array($var) ? array_map('stripslashes_recursive', $var) : stripslashes($var));
}

if (get_magic_quotes_gpc()) {
	$_GET = stripslashes_recursive($_GET);
	$_POST = stripslashes_recursive($_POST);
	$_COOKIE = stripslashes_recursive($_COOKIE);
}

?>

Here are some file manipulation functions in PHP:

function fileToArray($file) {
	if (!$array = file($file)) {
		die("fileToArray: Could not read file!");
	}
	return $array;
}

function fileToString($file) {
	if (!$string = file_get_contents($file)) {
		die("fileToString: Could not read file!");
	}
	return $string;
}

function stringToFile($file, $string) {
	if (!$handle = fopen($file,"w")) {
		die("stringToFile: Could not open file");
	}
	if (!fwrite($handle, $string))
		die("stringToFile: Could not write file");
	}
	fclose($handle); // Should the close handle be error checked, or would I be over doing it?
}

function arrayToFile($file, $array) {
	if (!$handle = fopen($file,"w")) {
		die("arrayToFile: Could not open file");
	}
	for ($i = 0; $i < count($array); $i++) {
		if ($i == count($array) - 1) {
			if (!fputs($handle, $array[$i])) {
				die("arrayToFile: Could not write file");
			}
		} else {
			if (!fputs($handle, $array[$i]."\n")) {
				die("arrayToFile: Could not write file");
			}
		}
	}
	fclose($handle);
}

Updated to include drwitt's fix. Shame on me! Well, as long as I learn from my mistakes :)

Get a (recursive) directory listing in an array. Directory's are included in this list. If this behavior is not wanted, remove the two lines:

$file = $directory . "/" . $file;
$array_items[] = preg_replace("/\/\//si", "/", $file);

To get a non recursive directory listing, use it like this:

$files = directoryToArray("./", false);

And to get a recursive directory listing, use it like this:

$files = directoryToArray("./", true);

Once you have an array of files, you can iterate over the directories/files like this:

echo '<ul>';

foreach ($files as $file) {
	echo '<li>' . $file . '</li>';
}

echo '</ul>';

or like this:

echo '<ul>';

for ($i = 0; $i <= count($files); $i++) {
	echo '<li>' . $files[$i] . '</li>';
}

echo '</ul>';

Code:

function directoryToArray($directory, $recursive) {
	$array_items = array();
	if ($handle = opendir($directory)) {
		while (false !== ($file = readdir($handle))) {
			if ($file != "." && $file != "..") {
				if (is_dir($directory. "/" . $file)) {
					if($recursive) {
						$array_items = array_merge($array_items, directoryToArray($directory. "/" . $file, $recursive));
					}
					$file = $directory . "/" . $file;
					$array_items[] = preg_replace("/\/\//si", "/", $file);
				} else {
					$file = $directory . "/" . $file;
					$array_items[] = preg_replace("/\/\//si", "/", $file);
				}
			}
		}
		closedir($handle);
	}
	return $array_items;
}

Hope someone can use it!