PHP Simple interactions with Shell

LinuxSystem.php

<?
/**
 * @author _LameMind <[email protected]>
 */
abstract class LinuxSystem {
	/**
	 * @param string $question
	 * @param array $admittedValues
	 * @return mixed 
	 */
	public static function askTerminal ($question, $admittedValues = array ("Y" => true, "N" => false)) {
		$questionStr = $question . " [" . implode (",", array_keys ($admittedValues)) . "]";
		do {
			$answer = readline ($questionStr);
		}
		while (!isset ($admittedValues[ $answer ]));
	
		return $admittedValues[ $answer ];
	}
	/**
	 * @param string $message 
	 */
	public static function notifyTerminal ($message) {
		readline ($message);
	}
}