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.
  
   
Example 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.