(PHP 4, PHP 5, PHP 7, PHP 8)
base64_decode — Decodes data encoded with MIME base64
   Decodes a base64 encoded string.
  
   Returns the decoded data or false on failure. The returned data may be
   binary.
  
Example #1 base64_decode() example
<?php
$str = 'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==';
echo base64_decode($str);
?>The above example will output:
This is an encoded string