Source Code: (back to article)

<?php

// Storing a string into the variable which
// needs to be Encrypted
$simple_string = "Welcome to W3docs";

// Displaying the original string
echo "Original String: " . $simple_string . "\n";

// Storing cipher method
$ciphering = "BF-CBC";

// Using OpenSSl encryption method
$iv_length = openssl_cipher_iv_length($ciphering);
$options = 0;

// Using random_bytes() function which gives
// randomly 16 digit values
$encryption_iv = random_bytes($iv_length);

// Alternatively, any 16 digits may be used
// characters or numeric for iv
$encryption_key = openssl_digest(php_uname(), 'MD5', true);

// Encryption of string process begins
$encryption = openssl_encrypt($simple_string, $ciphering, $encryption_key, $options, $encryption_iv);

// Display the encrypted string
echo "Encrypted String: " . $encryption . "\n";

// Decryption of string process begins
// Used random_bytes() that gives randomly
// 16 digit values
$decryption_iv = random_bytes($iv_length);

// Store the decryption key
$decryption_key = openssl_digest(php_uname(), 'MD5', true);

// Decrypting the string
$decryption = openssl_decrypt($encryption, $ciphering, $decryption_key, $options, $encryption_iv);

// Showing the decrypted string
echo "Decrypted String: " . $decryption;

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