头部显示在Apache错误日志（卷曲和贝宝）

Question

我刚刚注意到在我的错误日志中，每当我向PayPal API发出请求（使用php + curl）时，一些返回的头文件显示在我的Apache错误日志（不访问日志）。据我所知，这个特殊的要求从一开始就已经填满了我的日志（几个月后），但我第一次注意到它。现在我知道这不是什么大问题，但是我很乐意摆脱这个问题，因为这样可以更轻松地解决其他问题。

首先，这里是错误提示：

[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] * About to connect() to api-3t.paypal.com port 443 (#0) 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] * Trying 66.211.168.126... * connected 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] * Connected to api-3t.paypal.com (66.211.168.126) port 443 (#0) 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] * SSL connection using DES-CBC3-SHA 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] * Server certificate: 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] * \t subject: /C=US/ST=California/L=San Jose/O=PayPal, Inc./OU=Information Systems/CN=api-3t.paypal.com 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] * \t start date: 2009-09-24 00:00:00 GMT 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] * \t expire date: 2011-09-19 23:59:59 GMT 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] * \t issuer: /C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=Terms of use at https://www.verisign.com/rpa (c)09/CN=VeriSign Class 3 Secure Server CA - G2 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] * SSL certificate verify result: self signed certificate in certificate chain (19), continuing anyway. 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] > POST /nvp HTTP/1.1\r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] Host: api-3t.paypal.com\r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] Accept: */*\r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] Content-Length: 217\r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] Content-Type: application/x-www-form-urlencoded\r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] \r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] < HTTP/1.1 200 OK\r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] < Date: Thu, 17 Mar 2011 20:14:57 GMT\r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] < Server: Apache\r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] < Content-Length: 1162\r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] < Connection: close\r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] < Content-Type: text/plain; charset=utf-8\r 
[Thu Mar 17 15:14:19 2011] [error] [client 192.168.1.21] * Closing connection #0 

即使我让使用他们的示例代码的请求时，错误仍然显示。我甚至已经关闭了SSL_VERIFYPEER和SSL_VERIFYHOST curl选项，希望ssl（仍然有效）导致问题。我尝试了其他curl请求（不是通过ssl），并且它们不显示在错误日志中。

任何人都可以帮我找出问题吗？

Answer 1

尝试使用这种卷曲选项：

curl_setopt($ch, CURLOPT_VERBOSE,0); 

Answer 2

是否使用CURLOPT_CERTINFO？如此描述：

TRUE在安全传输上输出SSL认证信息到STDERR。

同时检查CURLOPT_VERBOSE，这对CURLOPT_CERTINFO启用在新的PHP版本的工作。