deslash( string $content )

function deslash($content) {
	// Note: \\\ inside a regex denotes a single backslash.

	/*
	 * Replace one or more backslashes followed by a single quote with
	 * a single quote.
	 */
	$content = preg_replace("/\\\+'/", "'", $content);

	/*
	 * Replace one or more backslashes followed by a double quote with
	 * a double quote.
	 */
	$content = preg_replace('/\\\+"/', '"', $content);

	// Replace one or more backslashes with one backslash.
	$content = preg_replace("/\\\+/", "\\", $content);

	return $content;
}