How does php encrypt and decrypt strings?

For users of e-commerce websites, the most important thing is the security of accounts and passwords. if the account and password are not encrypted, it will greatly increase security risks and never allow criminals to take advantage of them, therefore, in order to ensure that the interests and privacy of users are not disclosed, website development needs to encrypt the user's account and password. in this chapter, let's take a look at it, how to encrypt and decrypt the password. For users of e-commerce websites, the most important thing is the security of accounts and passwords. if the account and password are not encrypted, it will greatly increase security risks and never allow criminals to take advantage of them, therefore, in order to ensure that the interests and privacy of users are not disclosed, website development needs to encrypt the user's account and password. in this chapter, let's take a look at it, how to encrypt and decrypt the password.

First, we need to know that our password is a string, and the base64 encoding and decoding of the string can be achieved through PHP's predefined functions base64_encode () and base64_decode.

Base64_encode () function

The base64 encoding of characters is implemented using the base64_encode () function. The syntax is as follows:

 base64_encode(str);

This function implements base64 encoding for the string 'str.

Base64_decode () function

We use the base64_decode () function to decode the string. The syntax is as follows:

base64_decode(str);

The function is used to decrypt base64 encoded strings.

We have already introduced the two functions. how can we use them? See the following example.

Application example

The string functions base64_encode () and base64_decode () are used to encrypt and decrypt the password. the user's password is encrypted and decrypted using the following code:

    
     String encryption and decryption
 

When you click the submit button, use the string function base64_encode () and base64_decode () to encrypt and decrypt the password. the running result is as follows:

PHP provides many encryption and decryption functions, such as base64_encode () or md5 (). you can select a suitable function for use in actual use. For more information, see the topic of PHP encryption functions.

The preceding figure shows how php encrypts and decrypts strings? For more information, see other related articles in the first PHP community!