简单封装CURL请求，以及php获取url重定向后的链接

简单封装CURL请求，支持post与get

常用于请求微信API

//使用 curl 方法
function http_curl($url,$type='get',$res='json',$arr=''){
    //初始化 curl
    $ch = curl_init();
    //设置curl的参数
    curl_setopt($ch,CURLOPT_URL,$url);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
    //处理证书问题
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    //处理结束
    if($type == 'post'){
        //type 为post
        curl_setopt($ch,CURLOPT_POST,1);
        curl_setopt($ch,CURLOPT_POSTFIELDS,$arr);
    }
    //采集
    $output = curl_exec($ch);
    //关闭
    //curl_close($ch);
    if(curl_errno($ch)){
        return curl_errno($ch);   //报错
    }else{
        return json_decode($output,true);  //ok
    }
}

php获取url重定向后的链接
通过当前方法可以获取真实访问链接

get_to_url($url);
function get_to_url($url){
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HEADER, true);
        curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (X11; Linux x86_64; rv:21.0) Gecko/20100101 Firefox/21.0"); // Necessary. The server checks for a valid User-Agent.
        curl_exec($ch);

        $response = curl_exec($ch);
        preg_match_all('/^Location:(.*)$/mi', $response, $matches);
        curl_close($ch);
        return !empty($matches[1]) ? trim($matches[1][0]) : '';
    }

function http_post($sUrl, $aHeader, $aData){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_URL, $sUrl);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $aHeader);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($aData));
    $sResult = curl_exec($ch);
    if($sError=curl_error($ch)){
        die($sError);
    }
    curl_close($ch);
    return $sResult;
}

$url = 'https://www.example.com;
$header = array('User-Agent:Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36');
$data = array();
$data = http_post($url,$header,$data);