如何使用PHP开发公众号的素材管理功能

<?php

$appid = 'your_appid';
$appsecret = 'your_appsecret';

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

$res = file_get_contents($url);
$data = json_decode($res);

$access_token = $data->access_token;

// 将access_token保存起来，后续接口调用都需要使用到
file_put_contents('access_token.txt', $access_token);

<?php

$access_token = file_get_contents('access_token.txt');

$url = "https://api.weixin.qq.com/cgi-bin/media/upload?access_token=".$access_token."&type=image";

$file = new CURLFile(realpath('example.jpg'));

$data = array("media" => $file);

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$res = curl_exec($ch);

curl_close($ch);

$data = json_decode($res);

$media_id = $data->media_id;

// 将media_id保存起来，后续使用时可以根据media_id获取对应的素材
file_put_contents('media_id.txt', $media_id);

<?php

$access_token = file_get_contents('access_token.txt');
$media_id = file_get_contents('media_id.txt');

$url = "https://api.weixin.qq.com/cgi-bin/media/get?access_token=".$access_token."&media_id=".$media_id;

$res = file_get_contents($url);

file_put_contents('image.jpg', $res);