What are encryption methods without special symbols?

Question

PHP

Tell me, what are the encryption methods without special symbols in PHP? AES is not suitable, you need to transfer data in a string via GET

Answer 1

aes+base64

Answer 2

There are many ways to convert arbitrary characters to printable - UUEncode and Base64 (three characters are converted to four); Quoted-Printable (printable characters go as is, non-printable characters are converted one to three); there is another method that converts four to five, I don’t remember the name.