发现是后台脚本一直等待  排查到最后发现是curl 超时引起的等待

具体解决方案：

curl_setopt( $this->ch, CURLOPT_URL, $url );
curl_setopt( $this->ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt( $this->ch, CURLOPT_TIMEOUT_MS,3000);      //  3秒超时
curl_setopt( $this->ch, CURLOPT_HEADER, 0 );
curl_setopt( $this->ch, CURLOPT_SSL_VERIFYPEER, false );
curl_setopt( $this->ch, CURLOPT_SSL_VERIFYHOST, false );

PHP curl的超时主要有4个参数 原文如下;

There's a very distinctive difference between these two configurations within cURL. I'll try to define them for you, and then provide you a very common example which I share to people who I teach about cURL.

CURLOPT_CONNECTTIMEOUT is designed to tell the script how long to wait to make a successful connection to the server before starting to buffer the output. A destination's server which may be overloaded, offline or crashed would probably make this setting become useful.

CURLOPT_TIMEOUT is designed to tell the script how long to wait to receive a completely buffered output from the server. A destination's huge file, slow connection speeds or slow rendering would probably make this setting become useful.

A good example of where these will both apply to, is when you're telling cURL to download a MP3 file. CURLOPT_CONNECTTIMEOUT would be set at about 10 seconds which would mean that if no response is provided within 10 seconds then the script will abort, and CURLOPT_TIMEOUT would be set at about 100 seconds which would mean if the MP3 has not downloaded within 100 seconds then abort the script. It's the best way of explaining it to developers.

CURLOPT_CONNECTTIMEOUT

建立连接时候的超时设置

CURLOPT_TIMEOUT

接收信息时的超时设置

CURLOPT_CONNECTTIMEOUT_MS, CURLOPT_TIMEOUT_MS 意思相同 只是超时单位为毫秒了。。。