Base64 is a way to convert binary code to ASCII characters. The encoding is used in e-mail to send attachments (see MIME), but in other ways it is used on the Internet. The conversion to ASCII is necessary because many protocols on the Internet are built on the use of (7-bit) ASCII characters and not of 8-bit binary code.
<?php $text = 'This is a text'; $result = base64_encode($text); // $result now contains string 'VGhpcyBpcyBhIHRleHQ='
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