(PHP 4, PHP 5, PHP 7)
base64_encode — Encodes data with MIME base64
base64_encode ( string $data ) : string
Encodes the given data with base64.
This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies.
Base64-encoded data takes about 33% more space than the original data.
data
The data to encode.
The encoded data, as a string.
Example #1 base64_encode() example
<?php $str = 'This is an encoded string'; echo base64_encode($str); ?>
The above example will output:
VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==
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https://www.php.net/manual/en/function.base64-encode.php