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URL Functions	base64_encode

URL Functions	Last updated: Mon, 26 Oct 2026

base64_decode

(PHP 4, PHP 5, PHP 7, PHP 8)

base64_decode — Decodes data encoded with MIME base64

Description

function base64_decode(string $string, bool $strict = false): string|false

Decodes a base64 encoded string.

Parameters

string: The encoded data.
strict: If the strict parameter is set to true then the base64_decode() function will return false if the input contains character from outside the base64 alphabet. Otherwise invalid characters will be silently discarded.

Return Values

Returns the decoded data or false on failure. The returned data may be binary.

Examples

Example #1 base64_decode() example

<?php
$str = 'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==';
echo base64_decode($str);
?>

The above example will output:

This is an encoded string

See Also

base64_encode() - Encodes data with MIME base64
sodium_base642bin() - Decodes a base64-encoded string into raw binary.
» RFC 2045 section 6.8

URL Functions	base64_encode

URL Functions	Last updated: Mon, 26 Oct 2026