PHP Program to Add Two Binary Numbers

Given Two binary numbers, the task is to add two binary numbers in PHP.

Examples:

Input: num1 = '1001', num2 = '1010'
Output: 10011

Input: num1 = '1011', num2 = '1101'
Output: 11000

There are two methods to add to binary numbers, these are:

Using bindec() and decbin() Functions

In this approach, first we convert binary numbers to decimal number, then adding them, and then converting the sum to binary.

Example:

PHP

<?php

function addBinary($bin1, $bin2) {
    $dec1 = bindec($bin1);
    $dec2 = bindec($bin2);

    $sumDec = $dec1 + $dec2;
    $sumBin = decbin($sumDec);

    return $sumBin;
}

$num1 = '1011';
$num2 = '1101';

echo "Decimal Value: " . addBinary($num1, $num2);

?>

Output

Decimal Value: 11000

Using base_convert() Function

In this method, we use base_convert() method to convert binary to decimal, and then perform addition operation, and the last, convert the result back to binary using base_convert() function.

Example:

PHP

<?php

function addBinary($bin1, $bin2) {
    $dec1 = base_convert($bin1, 2, 10);
    $dec2 = base_convert($bin2, 2, 10);

    $sumDec = $dec1 + $dec2;
    $sumBin = base_convert($sumDec, 10, 2);

    return $sumBin;
}

$num1 = '1101';
$num2 = '1010';

echo "Decimal Value: " . addBinary($num1, $num2);

?>

Output

Decimal Value: 10111