解析获取优酷视频真实下载地址的PHP源代码

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我是靠谱客的博主老迟到过客，最近开发中收集的这篇文章主要介绍解析获取优酷视频真实下载地址的PHP源代码，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

复制代码代码如下:

<?php 
//--调用方法/demo.php?url=http://v.youku.com/v_show/id_XMzkyODA2NTEy.html 
echo getYoukuFlv($_GET['url']); 

function getYoukuFlv($url){ 
    preg_match("#id_(.*?)\.html#",$url,$out); 
    $id=$out[1]; 
    $content=get_curl_contents('http://v.youku.com/player/getPlayList/VideoIDS/'.$id); 
    $data=json_decode($content); 
    foreach($data->data[0]->streamfileids AS $k=>$v){ 
    $sid=getSid(); 
    $fileid=getfileid($v,$data->data[0]->seed); 
    $one=($data->data[0]->segs->$k); 
    if($k == 'flv' || $k == 'mp4') return "http://f.youku.com/player/getFlvPath/sid/{$sid}_00/st/{$k}/fileid/{$fileid}?K={$one[0]->k}"; 
    continue; 
    } 
}  
function get_curl_contents($url, $second = 5){ 
    if(!function_exists('curl_init')) die('php.ini未开启php_curl.dll'); 
    $c = curl_init(); 
    curl_setopt($c,CURLOPT_URL,$url); 
    $UserAgent=$_SERVER['HTTP_USER_AGENT']; 
    curl_setopt($c,CURLOPT_USERAGENT,$UserAgent); 
    curl_setopt($c,CURLOPT_HEADER,0); 
    curl_setopt($c,CURLOPT_TIMEOUT,$second); 
    curl_setopt($c,CURLOPT_RETURNTRANSFER, true); 
    $cnt = curl_exec($c); 
    $cnt=mb_check_encoding($cnt,'utf-8')?iconv('gbk','utf-8//IGNORE',$cnt):$cnt; //字符编码转换 
    curl_close($c); 
    return $cnt; 
} 
function getSid() { 
    $sid = time().(rand(0,9000)+10000); 
    return $sid; 
} 
function getkey($key1,$key2){ 
    $a = hexdec($key1); 
    $b = $a ^ 0xA55AA5A5; 
    $b = dechex($b); 
    return $key2.$b; 
} 
function getfileid($fileId,$seed) { 
    $mixed = getMixString($seed); 
    $ids = explode("*",$fileId); 
    unset($ids[count($ids)-1]); 
    $realId = ""; 
    for ($i=0;$i < count($ids);++$i) { 
    $idx = $ids[$i]; 
    $realId .= substr($mixed,$idx,1); 
    } 
    return $realId; 
} 
function getMixString($seed) { 
    $mixed = ""; 
    $source = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/\\:._-1234567890"; 
    $len = strlen($source); 
    for($i=0;$i< $len;++$i){ 
    $seed = ($seed * 211 + 30031) % 65536; 
    $index = ($seed / 65536 * strlen($source)); 
    $c = substr($source,$index,1); 
    $mixed .= $c; 
    $source = str_replace($c, "",$source); 
    } 
    return $mixed; 
} 
?>