array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'zh', ), 'this' => array ( 0 => 'context.http.php', 1 => 'HTTP context 选项', ), 'up' => array ( 0 => 'context.php', 1 => '上下文(Context)选项和参数', ), 'prev' => array ( 0 => 'context.socket.php', 1 => '套接字上下文选项', ), 'next' => array ( 0 => 'context.ftp.php', 1 => 'FTP 上下文选项', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'zh', 'path' => 'language/context/http.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
HTTP context 选项 — HTTP context 的选项列表
提供给 http://
和 https://
传输协议的 context 选项。
transports.
示例 #1 获取一个页面并发送 POST 数据
<?php
$postdata = http_build_query(
array(
'var1' => 'some content',
'var2' => 'doh'
)
);
$opts = array('http' =>
array(
'method' => 'POST',
'header' => 'Content-type: application/x-www-form-urlencoded',
'content' => $postdata
)
);
$context = stream_context_create($opts);
$result = file_get_contents('http://example.com/submit.php', false, $context);
?>
示例 #2 忽略重定向并获取 header 和内容
<?php
$url = "http://www.example.org/header.php";
$opts = array('http' =>
array(
'method' => 'GET',
'max_redirects' => '0',
'ignore_errors' => '1'
)
);
$context = stream_context_create($opts);
$stream = fopen($url, 'r', false, $context);
// header 信息和 stream 的元数据一样
var_dump(stream_get_meta_data($stream));
// $url 的实际数据
var_dump(stream_get_contents($stream));
fclose($stream);
?>
注意: 底层 socket stream 上下文选项
Additional context options may be supported by the underlying transport Forhttp://
streams, refer to context options for thetcp://
transport. Forhttps://
streams, refer to context options for thessl://
transport.
注意: HTTP 状态行
When this stream wrapper follows a redirect, thewrapper_data
returned by stream_get_meta_data() might not necessarily contain the HTTP status line that actually applies to the content data at index0
.第一个请求返回array ( 'wrapper_data' => array ( 0 => 'HTTP/1.0 301 Moved Permanently', 1 => 'Cache-Control: no-cache', 2 => 'Connection: close', 3 => 'Location: http://example.com/foo.jpg', 4 => 'HTTP/1.1 200 OK', ...301
(永久重定向), 因此 stream 包装器自动跟随重定向到获得200
响应(index =4
)。