问答项目---自定义标签调用户信息！

标签位置同样在 My.class.php

<?php
namespace CommonTag;
use ThinkTemplateTagLib;
class My extends TagLib{
    // 定义标签
    // 参考文章 : http://www.thinkphp.cn/topic/34758.html
    protected $tags = array(
        'topcates'=> array('attr'=>'limit'),
        'userinfo'=> array('attr'=>'uid'),
        'location'=> array('attr'=>'cid')
    );
    public function _topcates($attr,$content){
        //调用父类
        $limit = isset($attr['limit']) ? $attr['limit'] : '';
        // 组合PHP代码的字符串
        $str = '<?php ';
        $str .= '$where = array("pid" =>0);';
        $str .= '$_topcatesResult = M("category")->where($where)->limit('.$limit.')->select();';
        $str .= 'foreach($_topcatesResult as $v):';
        $str .= 'extract($v);?>';
        $str .= $content;
        $str .= '<?php endforeach;?>';
        return $str;
    }
    // 提取用户信息的标签
    public function _userinfo($attr,$content){
        $uid = $attr['uid'];
        $str = <<<str
<?php
    $field = array('id','username','face','answer','adopt','ask','point','exp');
    $_userinfoResult = M('user')->field($field)->find({$uid});
    extract($_userinfoResult);//写如字符表
    $face = empty($face) ? '/Public/Images/noface.gif' : '/Uploads/Face/'.$face;
    $face = '__ROOT__'.$face;
    $adopt = floor($adopt / $answer).'%';//采纳率
    $level = exp_to_level($exp);
?>
str;
    $str.=$content;
    return $str;
    }
    // location 标签
    public function _location($attr,$content){
        $cid = $attr['cid'];
        $str = <<<str
<?php 
    $cid = {$cid};
    if(S('location_'.$cid)){
        $_location_result = S('location_' . $cid);
    }else{
        $_location_category = M('category')->select();
        $_location_result = array_reverse(get_all_parent($_location_category,$cid));
        S('location_'.$cid);
    }
    foreach($_location_result as $v):
        extract($v);
?>
str;
    $str .= $content;
    $str .= '<?php endforeach; ?>';
    return $str;
    }
};