Руководство по PHP
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# base64_encode

(PHP 3, PHP 4, PHP 5)

base64_encode -- Encodes data with MIME base64

## Description

string base64_encode ( string data )

base64_encode() returns `data` encoded 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.

Пример 1. base64_encode() example

`<?php $str = 'This is an encoded string'; echo base64_encode($str); ?>`

This example will produce:

    VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==

See also base64_decode(), chunk_split(), convert_uuencode() and RFC 2045 section 6.8.

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