How to Print Binary Representation of an Integer in PHP

In PHP, printing the binary representation of an integer is very simple.

We will learn how to print binary representation of an integer in PHP using some example given below.

1. Using built-in function `decbin()`

$number = 10;
echo decbin($number);

Output:

This is the easiest and most common way.

If you want a fixed number of bits (e.g., 8-bit):

$number = 10;
echo str_pad(decbin($number), 8, "0", STR_PAD_LEFT);

Output:

00001010

$number = 10;
$binary = "";

while ($number > 0) {
    $binary = ($number % 2) . $binary;
    $number = intdiv($number, 2);
}

echo $binary;