微信公众号自定义分享内容实现

<?php

//curl获取请求文本内容

function get_curl_contents($url, $method ='GET', $data = array()) {

    if ($method == 'POST') {

        //使用crul模拟

        $ch = curl_init();

        //禁用https

        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

        //允许请求以文件流的形式返回

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

        curl_setopt($ch, CURLOPT_POST, 1);

        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));

        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);

        curl_setopt($ch, CURLOPT_DNS_CACHE_TIMEOUT, 30);

        curl_setopt($ch, CURLOPT_URL, $url);

        $result = curl_exec($ch); //执行发送

        curl_close($ch);

    }else {

        if (ini_get('allow_fopen_url') == '1') {

            $result = file_get_contents($url);

        }else {

            //使用crul模拟

            $ch = curl_init();

            //允许请求以文件流的形式返回

            curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

            //禁用https

            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

            curl_setopt($ch, CURLOPT_URL, $url);

            $result = curl_exec($ch); //执行发送

            curl_close($ch);

        }

    }

    return $result;

}

//获取微信公从号access_token

function wx_get_token() {

    $AppID = '1235464654';//AppID(应用ID)

    $AppSecret = '705641465sdfasdf456465a4sdf';//AppSecret(应用密钥)

    $url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid='.$AppID.'&secret='.$AppSecret;

    $res = get_curl_contents($url);

    $res = json_decode($res, true);

    //这里应该把access_token缓存起来，至于要怎么缓存就看各位了，有效期是7200s

    return $res['access_token'];

}

//获取微信公从号ticket

function wx_get_jsapi_ticket() {

    $url = sprintf("https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=%s&type=jsapi", wx_get_token());

    $res = get_curl_contents($url);

    $res = json_decode($res, true);

    //这里应该把access_token缓存起来，至于要怎么缓存就看各位了，有效期是7200s

    return $res['ticket'];

}

$wx = array();

//生成签名的时间戳

$wx['timestamp'] = time();

//生成签名的随机串

$wx['noncestr'] = 'Wm3WZYTPz0wzccnW';

//jsapi_ticket是公众号用于调用微信JS接口的临时票据。正常情况下，jsapi_ticket的有效期为7200秒，通过access_token来获取。

$wx['jsapi_ticket'] = wx_get_jsapi_ticket();

//分享的地址，注意：这里是指当前网页的URL，不包含#及其后面部分，曾经的我就在这里被坑了，所以小伙伴们要小心了

$wx['url'] = 'http://www.baidu.com';

$string = sprintf("jsapi_ticket=%s&noncestr=%s&timestamp=%s&url=%s", $wx['jsapi_ticket'], $wx['noncestr'], $wx['timestamp'], $wx['url']);

//生成签名

$wx['signature'] = sha1($string);

/*

注意事项

签名用的noncestr和timestamp必须与wx.config中的nonceStr和timestamp相同。

签名用的url必须是调用JS接口页面的完整URL。

出于安全考虑，开发者必须在服务器端实现签名的逻辑。

*/

?>