PHP Manualen
forrige | Appendiks L. List of Supported Protocols/Wrappers | næste

# HTTP and HTTPS

PHP 3, PHP 4, PHP 5. `https://` since PHP 4.3.0

- `http://example.com`

- `http://example.com/file.php?var1=val1&var2=val2`

- `http://user:password@example.com`

- `https://example.com`

- `https://example.com/file.php?var1=val1&var2=val2`

- `https://user:password@example.com`

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 ini file or the stream context, it will also be included in the request.

Advarsel

Ved brug af SSL, vil Microsoft IIS overtræde protokollen, ved at lukke forbindelsen uden at sende en close_notify indikator. PHP vil reportere dette som "SSL: Fatal Protocol Error" når du når til slutningen af datastrømmen. For at undgå dette, bør du sænke din error_reporting, til ikke at inkludere advarsler. PHP 4.3.7 og højere kan opdage den fejlagtige IIS server software når du åbner en stream ved hjælp af https:// wrapperen og vil skjule advarslen for dig. Hvis du benytter fsockopen() til at lave et ssl:// socket, er du selv ansvarlig for at opdage og skjule advarslen.

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), 0, 10) == 'location: ') {
/* update $url with where we were redirected to */
$url = substr($response, 10);
}
}
?>`

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.

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

Tabel L-2. 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

Tabel L-3. Context options

Name | Usage | Default
--- | --- | ---
method | `GET`, `POST`, or any other HTTP method supported by the remote server. | `GET`
header | Additional headers to be sent during request. Values in this option will override other values (such as User-agent:, Host:, and Authentication:). |
user_agent | Value to send with User-Agent: header. This value will only be used if user-agent is not specified in the header context option above. | `php.ini` setting: user_agent
content | Additional data to be sent after the headers. Typically used with POST or PUT requests. |
proxy | URI specifying address of proxy server. (e.g. tcp://proxy.example.com:5100 ). |
request_fulluri | When set to `TRUE`, the entire URI will be used when constructing the request. (i.e. GET http://www.example.com/path/to/file.html HTTP/1.0). While this is a non-standard request format, some proxy servers require it. | `FALSE`
max_redirects | The max number of redirects to follow. Added in PHP 5.1.0. | 20

> Underlying socket stream context options: Additional context options may be supported by the underlying transport For http:// streams, refer to context options for the tcp:// transport. For https:// streams, refer to context options for the ssl:// transport.

forrige | hjem | næste
Socket | op | FTP and FTPS