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<？php/** 广告加载管理类 * Date: 2013-08-04 * Author: fdipzone * Ver:1.0 * * Func: * publicload 加载广告集合 * publicsetConfig广告配置 * private getAds 根据channel创建广告集合 * private genZoneIdzoneid base64_encode 处理 * private genHtml生成广告html * private checkBrowser 检查是否需要同步加载的浏览器 */class ADLoader{ // class startprivate static $_ads = array（）; // 广告集合private static $_step = 300;// 广告加载间隔private static $_async = true;// 是否异步加载private static $_config = array（）;// 广告设置文件private static $_jsclass = null;// 广告JS class/** 加载广告集合 * @param String$channel 栏目,对应config文件 * @param int $step广告加载间隔 * @param boolean $async 是否异步加载 */public static function load（$channel="", $step="", $async=""）{if（isset（$step） && is_numeric（$step） && $step>0）{self::$_step = $step;}if（isset（$async） && is_bool（$async））{self::$_async = $async;}// 判断浏览器,如IE强制使用同步加载if（！self::checkBrowser（））{self::$_async = false;}self::getAds（$channel）;self::genZoneId（）;return self::genHtml（）;}/** 设置config * @param String $config广告配置 * @param String $jsclass js class文件路径 */public static function setConfig（$config=array（）, $jsclass=""）{self::$_config = $config;self::$_jsclass = $jsclass;}/** 根据channel创建广告集合 * @param String $channel 栏目 */private static function getAds（$channel=""）{$AD_Config = self::$_config;if（$AD_Config！=null）{self::$_ads = isset（$AD_Config[$channel]）？ $AD_Config[$channel] : $AD_Config["default"];}}/** zoneid base64_encode 处理 */private static function genZoneId（）{// 同步加载广告不需要处理zoneidif（！self::$_async）{return ;}$ads = self::$_ads;for（$i=0,$len=count（$ads）; $i<$len; $i++）{if（isset（$ads[$i]["zoneId"]））{$ads[$i]["zoneId"] = base64_encode（"var zoneid=".$ads[$i]["zoneId"].";"）;}}self::$_ads = $ads;}/** 生成广告html */private static function genHtml（）{$ads = self::$_ads;$html = array（）;if（self::$_jsclass！=null && $ads）{array_push（$html, "<script type="text/javascript" src="".self::$_jsclass.""></script>"）;// 同步需要预先加载if（！self::$_async）{foreach（$ads as $ad）{array_push（$html, "<div id="".$ad["domId"]."_container" style="display:none">"）;array_push（$html, "<script type="text/javascript">"）;array_push（$html, "ADLoader.preload（".json_encode（$ad）."）;"）;array_push（$html, "</script>"）;array_push（$html, "</div>"）;}}array_push（$html, "<script type="text/javascript">"）;array_push（$html, "var ads=".json_encode（$ads）.";"）;array_push（$html, "$（document）.ready（function（）{ ADLoader.load（ads, ".self::$_step.", ".intval（self::$_async）."）; }）;"）;array_push（$html, "</script>"）;}return implode（"rn", $html）;}/** 判断是否需要强制同步加载的浏览器 */private static function checkBrowser（）{$user_agent = $_SERVER["HTTP_USER_AGENT"];if（strstr（$user_agent,"MSIE"）！=""）{return false;}return true;}} // class end？>

<？php/** 广告配置文件 **/return array（"case_openx" => array（array（"type" => "openx","domId" => "ad_728x90","zoneId" => 452）,array（"type" => "openx","domId" => "ad_300x250","zoneId" => 449）,array（"type" => "openx","domId" => "ad_l2_300x250","zoneId" => 394）,）,"case_url" => array（array（"type" => "url","domId" => "ad_728x90","url" => "adurl.php？zoneid=452"）,array（"type" => "url","domId" => "ad_300x250","url" => "adurl.php？zoneid=449"）,array（"type" => "url","domId" => "ad_l2_300x250","url" => "adurl.php？zoneid=394"））,"case_sync_openx" => array（array（"type" => "openx","domId" => "ad_728x90","zoneId" => 452）,array（"type" => "openx","domId" => "ad_300x250","zoneId" => 449）,array（"type" => "openx","domId" => "ad_l2_300x250","zoneId" => 394）,）,"default" => array（array（"type" => "openx","domId" => "ad_728x90","zoneId" => 452）,array（"type" => "openx","domId" => "ad_300x250","zoneId" => 449）,array（"type" => "openx","domId" => "ad_l2_300x250","zoneId" => 394）,）,）;？>