php stream_context_create函数

函数原型：resource stream_context_create ([ array $options [, array $params ]] )

看个实例

//定义options数组
$opts=array
(
'http'=>array
(
'method'=>"get",
'header'=>"accept-language: enrn"."cookie: foo=barrn"
)
);
//创建数据流上下文
$context=stream_context_create($opts);
/*向指定地址发送http请求
请求中包含附加的头部信息*/
$fp=fopen('https://www.111cn.net','r',false,$context);
//输出文件指针处的所有数据
fpassthru($fp);
//关闭文件
fclose($fp);
/*
该代码的输出结果为：即请求的cookie值
array
(
[foo] => bar
)
*/

实例二

$default_opts=array
(
'http'=>array
(
'method'=>"get",
'header'=>"accept-language: enrn"."cookie: foo=bar",
'proxy'=>"tcp://10.54.1.39:8000"
)
);
$alternate_opts=array
(
'http'=>array
(
'method'=>"post",
'header'=>"content-type: application/x-www-form-urlencodedrn"."content-length: " . strlen("baz=bomb"),
'content'=>"baz=bomb"
)
);
$default=stream_context_get_default($default_opts);
$alternate=stream_context_create($alternate_opts);
/* sends a regular get request to proxy server at 10.54.1.39
* for using context options specified in $default_opts
*/
readfile('http://www.**ex*ample.com');
/* sends a post request directly to
* using context options specified in $alternate_opts
*/
readfile('http://www.exa*m*p*le.com', false, $alternate);