data:// — Datos (RFC 2397)
La envoltura de flujo data: (» RFC 2397).
data://text/plain;base64,
| 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 |
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'];
?>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
?>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.Now PHP supports data: protocol w/out "//" like data:text/plain, not data://text/plain,
I tried it.