data://

data:// — Data (RFC 2397)

Descripción

La envoltura del flujo data: (» RFC 2397) está disponible desde PHP 5.2.0.

Uso

data://text/plain;base64,

Opciones

**Resumen de la envolutra**
Atributo	Permitido
Restringido por allow_url_fopen	No
Restringido por allow_url_include	Sí
Permite Lecturas	Sí
Permite Escrituras	No
Permite Añadir contenido	No
Permite Lectura y Escritura Simultanea	No
Permite usar la función stat()	No
Permite usar la función unlink()	No
Permite usar la función rename()	No
Permite usar la función mkdir()	No
Permite usar la función rmdir()	No

Ejemplos

Ejemplo #1 Mostrar contenidos de data://


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

Ejemplo #2 Obtener el 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

sandaimespaceman at gmail dot com ¶

8 years ago


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

I tried it.

down

admin deskbitz net ¶

7 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

from dot php dot net at brainbox dot cz ¶

6 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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