CURL采集远程图片到本地时，图片漏采了怎么处理
远程图片保存到本地需要一定的时间，而采集一下子就会采集上百篇，这就导致很多图片还没来的及保存到本地，就开始采集下一条。
不设置采集间隔时间，用PHP能不能解决这个问题，只在图片保存到本地执行完成后再继续执行下一条
------解决思路----------------------
你不用 curl_multi 的吗？单个 curl 无法充分利用资源
CURLOPT_FILE 参数可直接写入文件，而不需要人工干预
------解决思路----------------------
CURLOPT_TIMEOUT 设置cURL允许执行的最长秒数
CURLOPT_CONNECTTIMEOUT 在发起连接前等待的时间，如果设置为0，则无限等待。
这2个试下，应该能解决问题。如果不能，请检查代码其他部分，不一定是curl的问题
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