List of Supported Protocols/Wrappers
PHP Manual

HTTP and HTTPS

PHP 4, PHP 5, PHP 6. https:// since PHP 4.3.0

Allows read-only access to files/resources via HTTP 1.0, using the HTTP GET method. A Host: header is sent with the request to handle name-based virtual hosts. If you have configured a user_agent string using your php.ini file or the stream context, it will also be included in the request.

Предупреждение

Ако използвате SSL, Microsoft IIS ще наруши протокола, като прекъсне връзката без да изпрати индикатора close_notify. При достигане до края на данните, PHP ще съобщи за това чрез "SSL: Fatal Protocol Error". За да се справите с това, трябва да намалите нивото на error_reporting така, че да не генерира предупреждения. PHP 4.3.7 и по-късните версии могат да разкриват неправилно работещ IIS сървър, когато отворите потока чрез опаковката https://, и ще подтиснат предупреждението. При използване на fsockopen() за създаване на ssl:// сокет, разработчикът е отговорен за това да открие и подтисне предупреждението.

Redirects have been supported since PHP 4.0.5; if you are using an earlier version you will need to include trailing slashes in your URLs. If it's important to know the URL of the resource where your document came from (after all redirects have been processed), you'll need to process the series of response headers returned by the stream.

<?php
$url 
'http://www.example.com/redirecting_page.php';

$fp fopen($url'r');

/* Prior to PHP 4.3.0 use $http_response_header
   instead of stream_get_meta_data() */
$meta_data stream_get_meta_data($fp);
foreach(
$meta_data['wrapper_data'] as $response) {

  
/* Were we redirected? */
  
if (substr(strtolower($response), 010) == 'location: ') {
    
/* update $url with where we were redirected to */
    
$url substr($response18);
  }

}

?>

The stream allows access to the body of the resource; the headers are stored in the $http_response_header variable. Since PHP 4.3.0, the headers are available using stream_get_meta_data().

HTTP connections are read-only; you cannot write data or copy files to an HTTP resource.

Забележка: HTTPS is supported starting from PHP 4.3.0, if you have compiled in support for OpenSSL.

Wrapper Summary
Attribute Supported
Restricted by allow_url_fopen Yes
Allows Reading Yes
Allows Writing No
Allows Appending No
Allows Simultaneous Reading and Writing N/A
Supports stat() No
Supports unlink() No
Supports rename() No
Supports mkdir() No
Supports rmdir() No

Custom headers may be sent with an HTTP request prior to version 5 by taking advantage of a side-effect in the handling of the user_agent INI setting. Set user_agent to any valid string (such as the default PHP/version setting) followed by a carriage-return/line-feed pair and any additional headers. This method works in PHP 4 and all later versions.

Example #1 Sending custom headers with an HTTP request

<?php
ini_set
('user_agent'"PHP\r\nX-MyCustomHeader: Foo");

$fp fopen('http://www.example.com/index.php''r');
?>

Results in the following request being sent:

GET /index.php HTTP/1.0
Host: www.example.com
User-Agent: PHP
X-MyCustomHeader: Foo


List of Supported Protocols/Wrappers
PHP Manual