调用新浪微博api发微博后的地址获取（数字mid转字串）

2013-05-19

在弄新浪api玩时发现不能直接得到发布微博后的地址。调用的api返回值中有个mid值（和id值一样），

先百度了下怎样把返回的json中的mid值转成单微博地址中的字串，，，发现较多人博客文章里提供了一个php 代码如下

<?php
$str62keys = array(
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
    "a", "b", "c", "d", "e", "f", "g", "h", "i", 
    "j", "k", "l", "m", "n", "o", "p", "q", 
    "r", "s", "t", "u", "v", "w", "x", "y", 
    "z","A", "B", "C", "D", "E", "F", "G", "H", 
    "I", "J", "K", "L", "M", "N", "O", "P", 
    "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"
);

/**
 * 10进制值转换为62进制
 * @param {String} int10 10进制值
 * @return {String} 62进制值
 */
function int10to62($int10) {
    global $str62keys;
    $s62 = '';
    $r = 0;
    while ($int10 != 0)
    {
        $r = $int10 % 62;
        $s62 = $str62keys[$r].$s62;
        $int10 = floor($int10 / 62);
    }
    return $s62;
}
/**
 * 
 * 通过mid获得短格式
 * @param string $mid
 * @return 短格式
 */
function getCodeByMid($mid){
    $url = '';

    for ($i = strlen($mid) - 7; $i > -7; $i -=7)//从最后往前以7字节为一组读取mid
    {
        $offset1 = $i < 0 ? 0 : $i;
        $offset2 = $i + 7;
        $num = substr($mid, $offset1,$offset2-$offset1); 
        //mid.substring(offset1, offset2);

        $num = int10to62($num);
        $url = $num .$url;
    }

    return $url;
}

echo getCodeByMid('221110410216147026');
?>

根据自己发的微博的数字mid ：3579758980192492  用上述方法得到的 url mid 为  zxsTwO4I   ，
而实际的url为：zxsTw0O4I。。

后来发现 新浪提供了个api  ：[http://open.weibo.com/wiki/Querymid](http://open.weibo.com/wiki/Querymid)

{ 
  "mid": "8Ras3qlz" 
}

$mid = json_decode(file_get_contents(“http://api.t.sina.com.cn/querymid.json?id=".$result['mid‘]));

echo $mid[‘mid’];

输出结果与单条微博地址中的URL一致。。

新浪还提供了反查api：[http://open.weibo.com/wiki/Queryid

](http://open.weibo.com/wiki/Queryid)新浪微博地址url字符与mid的相互转换截图如下

简单demo：
[![QQ截图20130519203414](http://www.iganlei.cn/wp-content/uploads/2013/05/QQ截图20130519203414-300x192.png)](http://www.iganlei.cn/wp-content/uploads/2013/05/QQ截图20130519203414.png)

发布微博并获取地址：
[![QQ截图20130519203530](http://www.iganlei.cn/wp-content/uploads/2013/05/QQ截图20130519203530-300x157.png)](http://www.iganlei.cn/wp-content/uploads/2013/05/QQ截图20130519203530.png)