解决办法:
$options = array(
'http' => array(
'method' => 'POST',
'header' => 'Content-type:application/x-www-form-urlencoded;charset=UTF-8',
'content' => $stringData
),
// 解决SSL证书验证失败的问题
"ssl"=>array(
"verify_peer"=>false,
"verify_peer_name"=>false,
)
);
$context = stream_context_create($options);
$data = file_get_contents($url, false, $context);