How to perform two way encryption using PHP
Overview
When we apply both the encryption and decryption functions to some data, we call it two-way encryption. In PHP, we can use the following two functions to perform two-way encryption.
-
base64_encode() -
base64_decode()
The base64_encode function
We can use the base64_encode function to encode the given data or string with the base 64.
Syntax
string base64_encode ( string $array )
Parameters
array: This is the array or string we need to encode.
Return type
This function will return the encoded data of a given string.
Example
<?php$arr = "Encrypted String";$temp = base64_encode($arr);echo $temp;?>
Explanation
- Line 2: We declare a string and store data in it.
- Line 3: We call the encryption function and pass the string to the function.
- Line 4: We print the encrypted string.
The base64_decode function
We can use the base64_decode function to decode the base 64 encoded data.
Syntax
string base64_decode ( string $array)
Parameters
array: This is the data we need to decode.
Return type
This function will return the decoded data.
Example
<?php$str = 'RW5jcnlwdGVkIFN0cmluZw==';echo base64_decode($str);?>
Explanation
-
Line 2: We declare a string and store encrypted data in it.
-
Line 3: We call the decryption function and pass the string to the function.
-
Line 4: We print the decrypted string.
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