微信公众平台开发文本消息嵌入超链接失败

$contentStr = "\n\n回复百度或回复“搜索” 了解详情\n其他文字";                                                                   


 $resultStr = sprintf($textTpl, $fromUsername, $toUsername, time(), $msgType, $contentStr);
 
 /*$resultStr = "
							
 							
 							".time()."
							
							
							";*/
                
echo $resultStr;
           					

$contentStr = "\n\n回复百度或回复“搜索” 了解详情\n其他文字";