Base64 Encode Decode in Php

Welcome to the Base64 Encode Decode in Php page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

<?php
function usage()
{
    exit("Usage: please provide a mode and a string to encode/decode");
}

// Cannot use the library function directly because it doesn't check if the
// length of the input string is a multiple of 4. The value of false is
// returned if the input string is invalid. Otherwise, the Base64 decoded
// string is returned
function base64_validate_and_decode($str)
{
    // Use the library function if length of input string is a multiple of 4.
    // Otherwise, just return false
    $result = false;
    if (strlen($str) % 4 == 0) {
        $result = base64_decode($str, true);
    }

    return $result;
}

// Exit if arguments are invalid
if (count($argv) < 3 || strlen($argv[2]) < 1)
{
    usage();
}

$mode = $argv[1];
$str = $argv[2];
switch ($mode) {
    case "encode":
        $result = base64_encode($str);
        break;

    case "decode":
        $result = base64_validate_and_decode($str);
        if ($result === false) {
            usage();
        }
        break;

    default:
        usage();
}

echo $result;

Base64 Encode Decode in Php was written by:

• rzuckerm

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

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