我将PHP环境升级到7.4.0后，使用curl向微信公众平台上传图片不能成功，代码如下所示，切换到php7.3.x版本运行正常。php7.4.0版本下，在http_post方法的倒数第二行打印相关信息，发现http_code为412。我暂时还没搞清楚PHP7.4.0对curl改进了哪些地方，于是我想问问大家这个问题如何解决？谢谢

php7.4.0更新日志：https://www.php.net/manual/zh... 中，关于curl的更新内容(我有些看不太懂)：

Attempting to serialize a CURLFile class will now generate an exception. Previously the exception was only thrown on unserialization.

Using CURLPIPE_HTTP1 is deprecated, and is no longer supported as of cURL 7.62.0.

The $version parameter of curl_version() is deprecated. If any value not equal to the default CURLVERSION_NOW is passed, a warning is raised and the parameter is ignored.

http_post('https://api.weixin.qq.com/cgi-bin/material/add_material?access_token=30_qWX84lsPcUMyvpkkVmGDyk2QkwfFz7HA6ufaeeI_NruPPPysaMVODEr8U8Ow4V6WccmvRi1aJ6oJ4Zq8wENwSUfneIaz6uuf2GqOOSHvtwBjVH0CXs_jCmOaasGf6CKBRN2B3YHyRzmCRhPpWMGiABAQGA&type=image');

function http_post($url){

$oCurl = curl_init();

curl_setopt($oCurl,CURLOPT_SSL_VERIFYPEER,false);

curl_setopt($oCurl,CURLOPT_SSL_VERIFYHOST,false);

curl_setopt($oCurl,CURLOPT_SSLVERSION,1);

curl_setopt($oCurl,CURLOPT_URL,$url);

curl_setopt($oCurl,CURLOPT_RETURNTRANSFER,1);

curl_setopt($oCurl,CURLOPT_POST,true);

curl_setopt($oCurl,CURLOPT_POSTFIELDS,['media'=>new CURLFile('C:\Users\TYJ\Desktop\10001.jpg')]);

$sContent = curl_exec($oCurl);

$aStatus = curl_getinfo($oCurl);

print_r(curl_error($oCurl));

curl_close($oCurl);

print_r($aStatus);

return intval($aStatus['http_code'])==200 ? $sContent : false;

}