Detect base64 encoding in PHP?

Question

Is there some way to detect if a string has been base64_encoded() in PHP?

We\'re converting some storage from plain text to base64 and part of it lives in a cookie

Answer 1

base64_decode() will not return FALSE if the input is not valid base64 encoded data. Use imap_base64() instead, it returns FALSE if $text contains characters outside the Base64 alphabet imap_base64() Reference