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PHP使用递归生成文章树

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Release: 2016-06-06 20:05:03
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写递归函数,可考虑缓存,定义一些静态变量来存上一次运行的结果,多程序运行效率很有帮助.大概步骤如下:首先到数据库取数据,放到一个数组,然后把数据转化为一个

因为自己的一个技术站,以文章为主,文章有些是一个系列的,所以想把这些文章归类,同一类的在一个下面。

数据库好设计,无非用id,fatherid来进行归类,,fatherid代表父类是那篇文章的id,id是文章的唯一id,层次不限,可以是两层,可以是三层。fatherid为0的表示顶层文章。

php代码,主要是递归

function category_tree($fatherid){ //require_once("mysql_class/config.inc.php"); //require_once("mysql_class/Database.class.php"); $db = new Database(DB_SERVER, DB_USER, DB_PASS, DB_DATABASE); $db->connect(); $sql = "SELECT id,title,url FROM ".TABLE_TASK." WHERE fatherid=$fatherid and ispublic=1 order by id asc"; $articles = $db->query($sql); $db->close(); while ($record = $db->fetch_array($articles)){ $i = 0; if ($i == 0){ if($fatherid==0){ echo '

    '; }else{ echo ''; } } }

    调用:

    category_tree(0) //先提取最顶层文章

    以上所述就是本文的全部内容了,希望大家能够喜欢。

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