PHP 7.0.6 Released

    stream_context_get_default

    (PHP 5 >= 5.1.0, PHP 7)

    stream_context_get_default — Retrieve the default stream context

    Description

    resource stream_context_get_default ([ array $options ] )

    Returns the default stream context which is used whenever file operations (fopen(), file_get_contents(), etc...) are called without a context parameter. Options for the default context can optionally be specified with this function using the same syntax as stream_context_create().

    Parameters

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

    Note:

    As of PHP 5.3.0, the stream_context_set_default() function can be used to set the default context.

    Return Values

    A stream context resource.

    Examples

    Example #1 Using stream_context_get_default()

    <?php
    $default_opts     = array(
          'http'=>array(
            'method'=>"GET",
            'header'=>"Accept-language: en\r\n" .
                      "Cookie: foo=bar",
            'proxy'=>"tcp://10.54.1.39:8000"
          )
    );


    $alternate_opts = array(
          'http'=>array(
            'method'=>"POST",
            'header'=>"Content-type: application/x-www-form-urlencoded\r\n" .
                      "Content-length: " . strlen("baz=bomb"),
            'content'=>"baz=bomb"
          )
    );

    $default = stream_context_get_default($default_opts);
    $alternate = stream_context_create($alternate_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');

    /* Sends a POST request directly to www.example.com
     * Using context options specified in $alternate_opts
     */
    readfile('http://www.example.com', false, $alternate);

    ?>

    See Also

    User Contributed Notes

    RQuadling at GMail dot com
    9 years ago
    If you are using stream_context_get_default() and are still finding that some functions do not work, make sure that they are not based upon the libxml functions (DOM, SimpleXML and XSLT). These require their own context.

    You can easily set them using the following code ...

    <?php
    // Define the default, system-wide context.
    $r_default_context = stream_context_get_default
            (
        array
            (
                'http' => array
                (     // All HTTP requests are passed through the local NTLM proxy server on port 8080.
                    'proxy' => 'tcp://127.0.0.1:8080',
                    'request_fulluri' => True,
                ),
            )
        );

    // Though we said system wide, some extensions need a little coaxing.
    libxml_set_streams_context($r_default_context);
    ?>
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