淘客长(短)链接提取商品id

<?php
//淘客长(短)网址提取商品id
//unescape 转码
function unescape($str) { 
    $ret = ''; 
    $len = strlen($str); 
    for ($i = 0; $i < $len; $i ++) 
    { 
        if ($str[$i] == '%' && $str[$i + 1] == 'u') 
        { 
            $val = hexdec(substr($str, $i + 2, 4)); 
            if ($val < 0x7f) 
                $ret .= chr($val); 
            else  
                if ($val < 0x800) 
                    $ret .= chr(0xc0 | ($val >> 6)) . 
                     chr(0x80 | ($val & 0x3f)); 
                else 
                    $ret .= chr(0xe0 | ($val >> 12)) . 
                     chr(0x80 | (($val >> 6) & 0x3f)) . 
                     chr(0x80 | ($val & 0x3f)); 
            $i += 5; 
        } else  
            if ($str[$i] == '%') 
            { 
                $ret .= urldecode(substr($str, $i, 3)); 
                $i += 2; 
            } else 
                $ret .= $str[$i]; 
    } 
       return $ret; 
    }


//使用curl模拟请求返回得到真实url
function getUrl($interger, $clickurl){
    if ($interger == 0){//淘宝客短连接
        $headers = get_headers($clickurl, TRUE);
        // var_dump($headers);echo "<hr>";
        $tu = $headers['Location'];
        $eturl = unescape($tu[1]);   //获取完整连接
        $u = parse_url($eturl);        //得到et的连接
        $param = $u['query'];                
        $ref = str_replace('tu=', '', $param);
        $curl_ref = $tu[1]; 

    }
    if ($interger == 1) {//淘宝客长连接
        $headers = get_headers($clickurl, TRUE);
        // var_dump($headers);echo "<hr>";
        $tu = $headers['Location'];
        $eturl = unescape($tu);   //获取完整连接
        $u = parse_url($eturl);        //得到et的连接
        $param = $u['query'];                
        $ref = str_replace('tu=', '', $param);
        $curl_ref = $tu;
    }

    $ch = curl_init();  
    curl_setopt($ch, CURLOPT_URL, $ref);                  
    curl_setopt($ch, CURLOPT_REFERER, $curl_ref);   
    curl_setopt($ch, CURLOPT_HEADER, false);  
    curl_setopt($ch, CURLOPT_NOBODY,1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION,true);
    curl_setopt($ch, CURLOPT_MAXREDIRS,2);                
    $out = curl_exec($ch);  
    $dd =  curl_getinfo($ch);
    curl_close($ch);  
    $item_url = $dd['url'];
    return $item_url; 
}

function getGoodId($url)
{
    $arrary = null;
    if (strpos($url, '?')) {
        $string = getUrl(1, $url);
    } else {
        $string = getUrl(0, $url);
    }
    $array = explode("&", $string);
    $array = explode("=", $array[0]);
    return $array[1];
}

$shortUrl = "http://s.click.taobao.com/0s9wtSx";

$longUrl  = "http://s.click.taobao.com/t?e=m%3D2%26s%3DiXAoCv04KwocQipKwQzePOeEDrYVVa64K7Vc7tFgwiG3bLqV5UHdqfQLyIrTqO%2FOjGYPrSmetxHJBeWGuImap%2BHrJgCSSM0oEDl2nELui%2F4%2BoqMzwamC58XPpYxuh%2B0%2FTGHAbzT0LqZfbSSjgeLIle%2BPFjHRYhaAasI%2By6E4HjaV8iXdx%2FoeKkhg2urGScCXsEYHIm3z3%2Fc55yxjpJ9KBMYOae24fhW0&pvid=19_219.72.200.154_32080_1474362268684";

$goodId1  = getGoodId($shortUrl);
$goodId2  = getGoodId($longUrl);

echo "<br><br>";
print_r($goodId1);
echo "<br><br>";
print_r($goodId2);