PHP Singleton

singleton.php

<?php

class scriptmem {
	public static $cache;
	public static function init() {
		if(self::$cache === null) {
			self::$cache = array();
		}
    		return self::$cache;
	}
	public static function get($ckey) {
		$res = false;
		$cache = self::init();
		if(array_key_exists($ckey, $cache)) {
			$res = $cache[$ckey];
		}
		return $res;
	}
	public static function set($ckey, $cval) {
		$cache = self::init();
		self::$cache[$ckey] = $cval;
	}
}

?>