data://

data://Data (RFC 2397)

Descrizione

The data: (» RFC 2397) stream wrapper is available since PHP 5.2.0.

Utilizzo

  • data://text/plain;base64,

Opzioni

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

Esempi

Example #1 Print data:// contents

<?php
// prints "I love PHP"
echo file_get_contents('data://text/plain;base64,SSBsb3ZlIFBIUAo=');
?>

Example #2 Fetch the media type

<?php
$fp   
fopen('data://text/plain;base64,''r');
$meta stream_get_meta_data($fp);

// prints "text/plain"
echo $meta['mediatype'];
?>
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User Contributed Notes 3 notes

up
4
admin deskbitz net
3 years ago
If you want to create a gd-image directly out of a sql-database-field you might want to use:

<?php
$jpegimage
= imagecreatefromjpeg("data://image/jpeg;base64," . base64_encode($sql_result_array['imagedata']));
?>

this goes also for gif, png, etc using the correct "imagecreatefrom$$$"-function and mime-type.
up
4
sandaimespaceman at gmail dot com
5 years ago
Now PHP supports data: protocol w/out "//" like data:text/plain, not data://text/plain,

I tried it.
up
1
from dot php dot net at brainbox dot cz
3 years ago
When passing plain string without base64 encoding, do not forget to pass the string through URLENCODE(), because PHP automatically urldecodes all entities inside passed string (and therefore all + get lost, all % entities will be converted to the corresponding characters).

In this case, PHP is strictly compilant with the RFC 2397. Section 3 states that passes data should be either in base64 encoding or urlencoded.

VALID USAGE:
<?php
$fp
= fopen('data:text/plain,'.urlencode($data), 'rb'); // urlencoded data
$fp = fopen('data:text/plain;base64,'.base64_encode($data), 'rb'); // base64 encoded data
?>

Demonstration of invalid usage:
<?php
$data
= 'Günther says: 1+1 is 2, 10%40 is 20.';

$fp = fopen('data:text/plain,'.$data, 'rb'); // INVALID, never do this
echo stream_get_contents($fp);
// Günther says: 1 1 is 2, 10@ is 20. // ERROR

$fp = fopen('data:text/plain,'.urlencode($data), 'rb'); // urlencoded data
echo stream_get_contents($fp);
// Günther says: 1+1 is 2, 10%40 is 20. // OK

// Valid option 1: base64 encoded data
$fp = fopen('data:text/plain;base64,'.base64_encode($data), 'rb'); // base64 encoded data
echo stream_get_contents($fp);
// Günther says: 1+1 is 2, 10%40 is 20. // OK
?>
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