stream_context_set_default()

(PHP 5 >= 5.3.0, PHP 7)

Set the default stream context

说明

stream_context_set_default(array $options): resource

Set the default stream context which will be used whenever file operations (fopen(),file_get_contents(), etc...) are called without a context parameter. Uses the same syntax asstream_context_create().

参数

$options: The options to set for the default context.
Note:
$optionsmust be an associative array of associative arrays in the format$arr['wrapper']['option']=$value.

返回值

Returns the default stream context.

范例

Example #1stream_context_set_default()example

<?php
$default_opts = array(
  'http'=>array(
    'method'=>"GET",
    'header'=>"Accept-language: en\r\n" .
              "Cookie: foo=bar",
    'proxy'=>"tcp://10.54.1.39:8000"
  )
);
$default = stream_context_set_default($default_opts);
/* Sends a regular GET request to proxy server at 10.54.1.39
 * For www.example.com using context options specified in $default_opts
 */
readfile('http://www.example.com');
?>

参见

stream_context_create() 创建资源流上下文
stream_context_get_default()Retrieve the default stream context
Listing of supported wrappers with context options (支持的协议和封装协议).