Diese Seite bei php.net
The PHP manual text and comments are covered by the Creative Commons Attribution 3.0 License © the PHP Documentation Group - Impressum - mail("TO:Reinhard Neidl",...)
data:// — Data (RFC 2397)
The data: (» RFC 2397) stream wrapper is available since PHP 5.2.0.
Beispiel #1 Print data:// contents
<?php
// prints "I love PHP"
echo file_get_contents('data://text/plain;base64,SSBsb3ZlIFBIUAo=');
?>
Beispiel #2 Fetch the media type
<?php
$fp = fopen('data://text/plain;base64,', 'r');
$meta = stream_get_meta_data($fp);
// prints "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.
Note that the official data URI scheme does not include a double slash after the colon - that you must include it when making calls to PHP is an artifact of the designers' misunderstanding of URL syntax.
To automatically convert proper data URIs to ones understood by PHP, you can use code such as the following:
<?php
function convertUriForPhp( $uri ) {
if( preg_match('/^data:(?!\\/\\/)(.*)$/',$uri,$bif) ) {
return 'data://' . $bif[1];
} else {
return $uri;
}
}
?>
Diese Seite bei php.net