data://

data:// — Datos (RFC 2397)

Descripción

La envoltura de flujo data: (» RFC 2397).

Uso

data://text/plain;base64,

Opciones

**Resumen de la envoltura**
Atributo	Soportado
Restringido por allow_url_fopen	Sí
Restringido por allow_url_include	Sí
Permite la lectura	Sí
Permite la escritura	No
Permite la adición	No
Permite la lectura y escritura simultáneamente	No
Soporte de la función stat()	No
Soporte de la función unlink()	No
Soporte de la función rename()	No
Soporte de la función mkdir()	No
Soporte de la función rmdir()	No

Ejemplos

Ejemplo #1 Mostrar un contenido data://

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

Ejemplo #2 Obtención del tipo de medio

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

// Muestra "text/plain"
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 ¶

15 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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