base64_encode()

base64_encode() — Encodes data with MIME base64.

Built-in function of PHP 8.5. The manual lists it as available in PHP 4, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.

What it does

This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies.

Signature

base64_encode(string $string): string

Parameters

Return value

The encoded data, as a string.

Example

A runnable snippet:

$str = 'This is an encoded string'; echo base64_encode($str);

Output:

VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==

See also

base64_decode(), chunk_split(), convert_uuencode()

All PHP 8.5 built-in functions

Reference card built from the PHP manual page base64_encode() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.