Ask, how to write PHP encryption algorithm

Excuse me, how to write PHP encryption algorithm
See some PHP code is completely encrypted after the garbled
So, how do you deal with that?



I see that Base64 seems to be able to encrypt only a single character, if it is a page, how to encrypt it?
How is the runtime restored?




------Solution--------------------
Base64 not only encrypt single characters

PHP Code

String Base64_encode (String $data) Base64_encode () returns encodes data using Base64. This encoding is designed so that binary data can be transmitted through a non-pure 8-bit transport layer, such as the body of an e-mail message. base64-encoded data takes up about 33% more space than the original data. Example #1 Base64_encode () example
  
  
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