Introduction
The data URI scheme has been defined in RFC 2397, published in 1998. It provides a mechanism to include in-line data in web page as if it is an external resource. PHP provides data:// wrapper for data URI representation. The data URI is represented as per following syntax
data:// syntax
data:[media type][;base64],data
parameters
media type − Default is text/plain
optional base64 extension base64, separated from the preceding part by a semicolon, ndicating that the data content is binary data, encoded using the Base64 scheme for binary-to-text encoding.
The data, separated from the preceding part by a comma (,). The data is a sequence of zero or more octets represented as characters.
Examples
Following example encodes a string to base64 format and then uses it as data in data:// URI
<?php
$string="TutorialsPoint India (p) Ltd";
$b64=base64_encode($string);
echo file_get_contents('data://text/plain;base64,'. $b64);
?>We can also use file_get_contents() function to fetch data from a file to convert in bas64 format
<?php
$string=file_get_contents("test.txt");
$b64=base64_encode($string);
echo file_get_contents('data://text/plain;base64,'. $b64);
?>Following example uses text/html as media type in data:// wrapper
<?php
$string=file_get_contents("test.html");
$b64=base64_encode($string);
echo file_get_contents('data://text/html;base64,'. $b64);
?>