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PHP - Manual: stream_context_set_default

2024-12-22

stream_context_set_default

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

stream_context_set_defaultSet 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 as stream_context_create().

参数

options

The options to set for the default context.

注意:

options must be an associative array of associative arrays in the format $arr['wrapper']['option'] = $value.

返回值

Returns the default stream context.

范例

示例 #1 stream_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

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User Contributed Notes 1 note

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0
Mahmoud Saeed
8 months ago
It's worth mentioning that passing an empty array will NOT reset default options.

<?php
stream_context_set_default
(array()); // Does nothing.
?>

官方地址:https://www.php.net/manual/en/function.stream-context-set-default.php

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