class='pingjiaf' frameborder='0' src='http://biancheng.dnbcw.info/pingjia.php?id=326444' scrolling='no'> 这儿有三种方法从html中脱离，同时加入“php代码模式”
example 5-1. 从html中脱离的方法
1. echo(this is the simplest, an sgml processing instruction\n); ?>
2. php echo(if you want to serve xml documents, do like this\n); ?>
3.