data://

data:// — データ (RFC 2397)

説明

data: (» RFC 2397) ストリームラッパーです。

利用法

data://text/plain;base64,

オプション

**ラッパーの概要**
属性	サポートの有無
allow_url_fopen で制約される	Yes
allow_url_include で制約される	Yes
読み込み許可	Yes
書き込み許可	No
追加許可	No
同時読み書き許可	No
stat() のサポート	No
unlink() のサポート	No
rename() のサポート	No
mkdir() のサポート	No
rmdir() のサポート	No

例

例1 data:// の内容の表示

<?php
// "I love PHP" と表示します
echo file_get_contents('data://text/plain;base64,SSBsb3ZlIFBIUAo=');
?>

例2 media type の取得

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

// "text/plain" と表示します
echo $meta['mediatype'];
?>

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User Contributed Notes 3 notes

down

from dot php dot net at brainbox dot cz ¶

13 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

?>

down

admin deskbitz net ¶

14 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.

down

sandaimespaceman at gmail dot com ¶

16 years ago

Now PHP supports data: protocol w/out "//" like data:text/plain, not data://text/plain,

I tried it.

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