在我的php设置中http_post出现文件权限错误

我正在尝试向服务器发送http_post_fields：

 $emailAddress = "email@email.com";
 $emailPassword = "password";
 $post = array ('cmd' => 'cmd_user_login',
                'lcmd' => 'user_delete',
                'show' => 'simple_msg.xml',
                'username' => 'uName',
                'password' => 'uPassword',
                'lusername' => $emailAddress,
                'lpassword' => $emailPassword,
                'uid' => $emailAddress);
 $result = http_post_fields('https://1.2.3.4:7443/cgi/user.cgi',$post);

当我尝试在浏览器中运行此页面时，我的http error_logs中出现以下错误：

PHP Warning:  http_post_fields(): Couldn't connect to server; 
Failed to connect to 1.2.3.4:Permission denied

如果我尝试从命令行运行这个脚本，它运行得很好。在我的php设置中似乎有一个文件权限问题，我该如何开始解决这个问题？