base64_encode and base64_decode: (PHP 4, PHP 5, PHP 7) base64_encode — Encodes data with MIME base64 Syntax: string base64_encode ( string $data ) Encodes the given data with base64. Example: <?php $str = 'eabhyas.blogspot.com'; echo base64_encode($str); ?> Output: ZWFiaHlhcy5ibG9nc3BvdC5jb20= (PHP 4, PHP 5, PHP 7) base64_decode — Decodes data encoded with MIME base64 Syntax: string base64_decode ( string $data [, bool $strict = false ] ) Decodes a base64 encoded data . Example: <?php $str = 'ZWFiaHlhcy5ibG9nc3BvdC5jb20='; echo base64_decode($str); ?> Output: eabhyas.blogspot.com Function : <? function sscb64ende($s,$t=0){ if($t==0){ $v=base64_encode($s); $v = strtr($v, '+/=', '-_,'); } else { $v = strtr($s, '-_,', '+/='); $v=base64_decode($v); } return $v; } ?>