Breaking News: Grepper is joining You.com. Read the official announcement!

Ceasar Cipher in PHP

Mohamed Moncef EL ATLASSY answered on August 3, 2022 Popularity 7/10 Helpfulness 1/10

answer Ceasar Cipher in PHP

Ceasar Cipher in PHP

Comment

-1

function Cipher($ch, $key)
{
	if (!ctype_alpha($ch))
		return $ch;

	$offset = ord(ctype_upper($ch) ? 'A' : 'a');
	return chr(fmod(((ord($ch) + $key) - $offset), 26) + $offset);
}

function Encipher($input, $key)
{
	$output = "";

	$inputArr = str_split($input);
	foreach ($inputArr as $ch)
		$output .= Cipher($ch, $key);

	return $output;
}

function Decipher($input, $key)
{
	return Encipher($input, 26 - $key);
}

// Example
$text = "The quick brown fox jumps over the lazy dog";
$cipherText = Encipher($text, 3);
$plainText = Decipher($cipherText, 3);

// Output
$cipherText = "Wkh txlfn eurzq ira mxpsv ryhu wkh odcb grj";

Popularity 7/10 Helpfulness 1/10 Language php

Source: www.programmingalgorithms.com

Tags: php

Link to this answer
Share Copy Link