data://

data:// — Daten (RFC 2397)

Beschreibung

Der Stream-Wrapper data: (» RFC 2397).

Verwendung

data://text/plain;base64,

Optionen

**Zusammenfassung des Wrappers**
Eigenschaft	wird unterstützt
Eingeschränkt durch allow_url_fopen	Ja
Eingeschränkt durch allow_url_include	Ja
Erlaubt Lesen	Ja
Erlaubt Schreiben	Nein
Erlaubt Anfügen	Nein
Erlaubt gleichzeitiges Lesen und Schreiben	Nein
Unterstützt stat()	Nein
Unterstützt unlink()	Nein
Unterstützt rename()	Nein
Unterstützt mkdir()	Nein
Unterstützt rmdir()	Nein

Beispiele

Beispiel #1 Ausgabe des Inhalts von data://

<?php
// gibt "Ich liebe PHP" aus
echo file_get_contents('data://text/plain;base64,SSBsb3ZlIFBIUAo=');
?>

Beispiel #2 Abrufen des Medientyps

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

// gibt "text/plain" aus
echo $meta['mediatype'];
?>

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User Contributed Notes 3 notes

down

from dot php dot net at brainbox dot cz ¶

14 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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