微信公众平台开发实例 PHP开发 代码挂载SAE平台(六)星座物语 php解析xml文件
今天带来的是查询每日星座运势的功能,这个功能非常简单,在微信平台上输入星座名称加一个标识符(例如“+”号),后台程序匹配这个标识符调用相应的功能。
具体流程上:1.使用字符串分割函数explode(w3school)获取到星座名称。
2.将星座名称匹配成相应的星座编号。
3.将这个编号传递给相应的API。
4.接收API返回的xml格式的数据。
5.处理xml格式的数据。
6.生成结果。
其中我再制作过程中由于是初学者,在第五步费了些功夫。API返回的xml格式为
[html]
……
首先我使用file_get_contents() 函数把API返回的数据文件读入一个字符串中。然后用simplexml_load_string() 函数把 XML 字符串载入对象中。然后再使用这个对象读取每个xml标签中的数据,但这里我遇到了一个问题,返回的xml格式的文件都是
[html]
这种格式,这样我使用“对象”->item->title的方法只能读取到第一个item的数据,这里我最终使用的办法的使用
[php]
foreach ($xml->item as $th) {
$content_title[$i] = $th->title;
$content_rank[$i] = $th->rank;
$content_value[$i] = $th->value;
$i++;
}
对这个对象“$xml”实现遍历,并使用一个自增变量i把每一组的数据存储在数组中。
其中的foreach 语句用于循环遍历数组。
每进行一次循环,当前数组元素的值就会被赋值给 value 变量(数组指针会逐一地移动) - 以此类推。
语法
[php]
foreach (array as value)
{
code to be executed;
}
例子
下面的例子示范了一个循环,这个循环可以输出给定数组的值:
[php]
$arr=array("one", "two", "three");
foreach ($arr as $value)
{
echo "Value: " . $value . "
";
}
?>
程序源代码如下:
[php]
function xingzuo($keyword) {
if (make_xingzuo($keyword)) {
$keyword = make_xingzuo($keyword);
$qurl = 'http://api.uihoo.com/astro/astro.http.php?fun=day&id=' . $keyword . '&format=xml';
$content = file_get_contents($qurl);
$xml = simplexml_load_string($content);
$i = 0;
foreach ($xml->item as $th) {
$content_title[$i] = $th->title;
$content_rank[$i] = $th->rank;
$content_value[$i] = $th->value;
$i++;
}
return "星座运势:\n综合运势:" . $content_rank[0] . "颗星\n爱情运势:" . $content_rank[1] . "颗星\n学习状态:" . $content_rank[2] . "颗星\n理财运势:" . $content_rank[3] . "颗星\n健康指数:" . $content_value[4] . "\n幸运颜色:" . $content_value[6] . "\n幸运数字:" . $content_value[7] . "\n速配星座:" . $content_value[8] . "\n综合概述:" . $content_value[9];
}
else
return "输入的星座小编不认识哎>_
}
function make_xingzuo($keyword){
$arr = array('白羊座' => '0','金牛座' => '1','双子座' => '2','巨蟹座' => '3','狮子座' => '4','处女座' => '5','天秤座' => '6','天平座' => '6','天蝎座' => '7','射手座' => '8','摩羯座' => '9','水瓶座' => '10','双鱼座' => '11');
if(strtr($keyword, $arr)0){
return strtr($keyword, $arr);
}
else {
return false;
}
}

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