sample.php

/**
	 * This function should return true if the current user can publish this
	 * page. It can be overloaded to customise the security model for an
	 * application.
	 * 
	 * Denies permission if any of the following conditions is TRUE:
	 * - canPublish() on any decorator returns FALSE
	 * - canEdit() returns FALSE
	 * 
	 * @uses SiteTreeDecorator->canPublish()
	 *
	 * @param Member $member
	 * @return boolean True if the current user can publish this page.
	 */
	public function canPublish($member = null) {
		if(!$member || !(is_a($member, 'Member')) || is_numeric($member)) $member = Member::currentUser();
		
		if($member && Permission::checkMember($member, "ADMIN")) return true;

		// Standard mechanism for accepting permission changes from decorators
		$extended = $this->extendedCan('canPublish', $member);
		if($extended !== null) return $extended;

		// Normal case - fail over to canEdit()
		return $this->canEdit($member);
	}
	
	public function canDeleteFromLive($member = null) {
		// Standard mechanism for accepting permission changes from decorators
		$extended = $this->extendedCan('canDeleteFromLive', $member);
		if($extended !==null) return $extended;

		return $this->canPublish($member);
	}