Don't try to re-use the ressource returned by stream_context_create. It seems not to work when connecting to different domains using https.
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
stream_context_create — 创建资源流上下文
$options = ?
, array $params = ?
) : resource
创建并返回一个资源流上下文，该资源流中包含了 options 中提前设定的所有参数的值。
options
必须是一个二维关联数组，格式如下：$arr['wrapper']['option'] = $value 。
默认是一个空数组。
params
必须是 $arr['parameter'] = $value 格式的关联数组。
请参考 context parameters 里的标准资源流参数列表。
上下文资源流，类型为 resource 。
| 版本 | 说明 |
|---|---|
| 5.3.0 |
增加了可选参数 params 。
|
Example #1 使用 stream_context_create()
<?php
$opts = array(
'http'=>array(
'method'=>"GET",
'header'=>"Accept-language: en\r\n" .
"Cookie: foo=bar\r\n"
)
);
$context = stream_context_create($opts);
/* Sends an http request to www.example.com
with additional headers shown above */
$fp = fopen('http://www.example.com', 'r', false, $context);
fpassthru($fp);
fclose($fp);
?>
Don't try to re-use the ressource returned by stream_context_create. It seems not to work when connecting to different domains using https.
I spent a good five hours trying to figure this out, so hopefully it will save someone else some time.
When you are trying to download a file via ftp through an HTTP proxy note that the following will not be enough:
<?php
$opts = array('ftp' => array(
'proxy' => 'tcp://vbinprst10:8080',
'request_fulluri'=>true,
'header' => array(
"Proxy-Authorization: Basic $auth"
)
)
);
$context = stream_context_create($opts);
$s = file_get_contents("ftp://anonymous:[email protected]",false,$context);
?>
Your proxy will respond that authentication is required. You may scratch your head and think "but I'm providing authentication!"
The issue is that the 'header' value is only applicable to http connections. So to authenticate on a proxy, you first have to pull a file from HTTP, before the context is valid for using on FTP.
<?php
$opts = array('ftp' => array(
'proxy' => 'tcp://vbinprst10:8080',
'request_fulluri'=>true,
'header' => array(
"Proxy-Authorization: Basic $auth"
)
),
'http' => array(
'proxy' => 'tcp://vbinprst10:8080',
'request_fulluri'=>true,
'header' => array(
"Proxy-Authorization: Basic $auth"
)
)
);
$context = stream_context_create($opts);
$s = file_get_contents("http://www.example.com",false,$context);
$s = file_get_contents("ftp://anonymous:[email protected]",false,$context);
?>
It's a bit roundabout, but it works. Note that the 'header' val in the ftp array is redundant, but I kept it in anyway.
When using the https protocol you'll have to make sure to set the right context options to use the full "power" of the ssl/tls encryption.
<?php
$url = 'https://secure.example.com/test/1';
$contextOptions = array(
'ssl' => array(
'verify_peer' => true,
'cafile' => __DIR__ . '/cacert.pem',
'verify_depth' => 5,
'CN_match' => 'secure.example.com'
)
);
$sslContext = stream_context_create($contextOptions);
$result = file_get_contents($url, NULL, $sslContext);
?>
More information about those context options can be found at http://php.net/manual/en/context.ssl.php
If you are trying to set a custom http header on php 5.2.x, try this:
<?php
// build header and set it the usual way
$authenticationHeader = $headername . ': ' . $headervalue;
$opts = array(
'http' => array(
'header' => $authenticationHeader
)
);
// workaround for php bug where http headers don't get sent in php 5.2
if(version_compare(PHP_VERSION, '5.3.0') == -1){
ini_set('user_agent', 'PHP-SOAP/' . PHP_VERSION . "\r\n" . $authenticationHeader);
}
$context = stream_context_create($opts);
// now use context for soap call or whatever...
?>
this is the only option that worked for me.
I big NOTE that i hope will help some one. Something that is not mentioned in the documentation, is that when php is compiled --with-curlwrappers,
So, instead of:
<?php
$opts = array(
'http'=>array(
'method'=>"GET",
'header'=>"Accept-language: en\r\n" .
"Cookie: foo=bar\r\n"
)
);
$context = stream_context_create($opts);
?>
You would setup the header this way:
<?php
$opts = array(
'http'=>array(
'method'=>"GET",
'header'=>array("Accept-language: en",
"Cookie: foo=bar",
"Custom-Header: value")
)
);
$context = stream_context_create($opts);
?>
This will work.
Connection via Proxy
<?php
$opts = array('http' => array('proxy' => 'tcp://127.0.0.1:8080', 'request_fulluri' => true));
$context = stream_context_create($opts);
$data = file_get_contents('http://www.php.net', false, $context);
echo $data;
?>
In some cases, set a header option as an array, and not a string, depending on server configuration.
<?php
$opts = array(
'http'=> array(
'method'=> "GET",
'header'=> array( "Cookie: foo="bar"l ),
'user_agent'=> $_SERVER['HTTP_USER_AGENT']
)
);
?>
I found the following code worked for me for POSTing some binary data to a remote server. I am putting it here since I could not find a quick solution to this by 'googling' or looking through this documentation.
Disclaimer: I have no idea if this a 'good' solution, since I'm new to PHP, but it may just suit your needs as it did mine. I am assuming bad things will happen with very large files since the entire file is read into $fileContents.
I am using PHP 5.2.8.
$fileHandle = fopen("someImage.jpg", "rb");
$fileContents = stream_get_contents($fileHandle);
fclose($fileHandle);
$params = array(
'http' => array
(
'method' => 'POST',
'header'=>"Content-Type: multipart/form-data\r\n",
'content' => $fileContents
)
);
$url = "http://somesite.somecompany.com?someParam=someValue";
$ctx = stream_context_create($params);
$fp = fopen($url, 'rb', false, $ctx);
$response = stream_get_contents($fp);
In addition to the context options mentioned above (appendix N), lower down context options for sockets can be found in appendix P - http://www.php.net/manual/en/transports.php
Something to keep in mind when creating SSL streams (using https://):
<?php
$context = context_create_stream($context_options)
$fp = fopen('https://url', 'r', false, $context);
?>
One would think - the proper way to create a stream options array, would be as follows:
<?php
$context_options = array (
'https' => array (
'method' => 'POST',
'header'=> "Content-type: application/x-www-form-urlencoded\r\n"
. "Content-Length: " . strlen($data) . "\r\n",
'content' => $data
)
);
?>
THAT IS THE WRONG WAY!!!
Take notice to the 3rd line: 'https' => array (
The CORRECT way, is as follows:
<?php
$context_options = array (
'http' => array (
'method' => 'POST',
'header'=> "Content-type: application/x-www-form-urlencoded\r\n"
. "Content-Length: " . strlen($data) . "\r\n",
'content' => $data
)
);
?>
Notice, the NEW 3rd line: 'http' => array (
Now - keep this in mind - I spent several hours trying to trouble shoot my issue, when I finally stumbled upon this non-documented issue.
The complete code to post to a secure page is as follows:
<?php
$data = array ('foo' => 'bar', 'bar' => 'baz');
$data = http_build_query($data);
$context_options = array (
'http' => array (
'method' => 'POST',
'header'=> "Content-type: application/x-www-form-urlencoded\r\n"
. "Content-Length: " . strlen($data) . "\r\n",
'content' => $data
)
);
$context = context_create_stream($context_options)
$fp = fopen('https://url', 'r', false, $context);
?>
It seems that the authorization example given below by"php at charlesconsulting dot com" does NOT work with PHP 5.2.1, since the 'header' option will be simply ignored if it is not an array (but a string).
The following works:
$url = 'http://protectedstuff.com';
$auth = base64_encode('user:password');
$header = array("Authorization: Basic $auth");
$opts = array( 'http' => array ('method'=>'GET',
'header'=>$header));
$ctx = stream_context_create($opts);
file_get_contents($url,false,$ctx);
See also http://bugs.php.net/bug.php?id=41051
Here's an example of retrieving a page which requests a username and password using the basic authorization scheme. This calls the w3.org web page validator for a password protected page.
//$fileurl contains page to validate
$validateurl="http://validator.w3.org/check?uri=$fileurl";
$cred = sprintf('Authorization: Basic %s',
base64_encode('username:password') );
$opts = array(
'http'=>array(
'method'=>'GET',
'header'=>$cred)
);
$ctx = stream_context_create($opts);
$validate=file_get_contents($validateurl,false,$ctx);
Here's a very simple way to do posts easily without need of cURL or writing an http request by hand using the tcp:// wrapper. I like using contexts just because of their ubiquity and the lack of an optional library such as cURL (though one of the more popular libraries).
<?php
$options = array(
'http'=>array(
'method'=>"POST",
'header'=>
"Accept-language: en\r\n".
"Content-type: application/x-www-form-urlencoded\r\n",
'content'=>http_build_query(array('foo'=>'bar'))
));
$context = stream_context_create($options);
fopen('http://www.example.com/',false,$context);
?>
Hi,you can create an array of parameters(what it's called a stream context),which can be transmitted each time you read or write a stream through a socket.In the below example:
$opts =array('http'=>arra('method'=>"GET",
'header'=>"Accept-language:en\r\n"."Cookie: foo=bar\r\n");
What you're actually doing is create a set of parameters(the protocol to be used,the request method,additional http headers and a cookie) which will be used each time you open a socket connection to request www.example.com.This saves a lot of time if you want to use these parameters (called a stream context) whenever you include them when making a request to www.example.com,instead of having to specify them over and over again.
Using the previous example,say you want to create a stream context,which sends a "Content-Type" http header and utilize it when making a request to www.example.com.Take a look:
$opts = array('http'=>array('method'=>"GET",
'header'=>"Content-Type: text/xml; CHARSET=gb2312");
$context = stream_context_create($opts);
$fp = fopen('http://www.example.com','r',false,$context);
fpassthru($fp);
fclose($fp);
Now,when you make a request to www.example.com,the above http header will be included within the socket and transmitted to the server.Best of luck for you friends,Hossein