PHP stream_context_create()作用和用法分析

作用：创建并返回一个文本数据流并应用各种选项，可用于fopen(),file_get_contents()等过程的超时设置、代理服务器、请求方式、头信息设置的特殊过程。 
函数原型：resource stream_context_create ([ array $options [, array $params ]] )

fopen例子：

<?php 
$opts = array( 'http-->array( 
'method'=>"GET", 
'header'=>"Accept-language: en\r\n" . 
"Cookie: foo=bar\r\n" 
) 
); 
$context = stream_context_create($opts); 
/* Sends an http request to www.jb51.net 
with additional headers shown above */ 
$fp = fopen('http://www.baidu.com/index.php', 'r', false, $context); 
fpassthru($fp); 
fclose($fp); 
?> 

 

file_get_contents例子：

<?php 
$opts = array('http' => array('proxy' => 'tcp://127.0.0.1:8080', 'request_fulluri' => true)); 
$context = stream_context_create($opts); 
$data = file_get_contents('http://www.baidu.com', false, $context); 
echo $data; 
?>